scholarly journals Haloferax profundi sp. nov. and Haloferax marisrubri sp. nov., Isolated from the Discovery Deep Brine-Seawater Interface in the Red Sea

2020 ◽  
Vol 8 (10) ◽  
pp. 1475
Author(s):  
Guishan Zhang ◽  
Xiaoyan Dong ◽  
Yingjiao Sun ◽  
André Antunes ◽  
Tyas Hikmawan ◽  
...  
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Red Sea ◽  
Type Strain ◽  
Novel Species ◽  
Sequence Similarity ◽  
Rrna Gene ◽  
Gram Negative ◽  
The 16S Rrna Gene

Two extremely halophilic archaeal strains, designated SB29T and SB3T, were isolated from the brine-seawater interface of Discovery Deep in the Red Sea. Cells of both strains were pleomorphic (irregular polyhedrals, ovals, and rods) and stained Gram-negative; colonies were pigmented pink. The sequence similarity of the 16S rRNA gene of strain SB29T with that of its most closely related validly described species (Hfx. sulfurifontis DSM 16227T) and that of strain SB3T with its closest validly described relative (Hfx. denitrificans ATCC 35960T) was 98.1% and 98.6%, respectively. The incomplete draft genomes of SB29T and SB3T are 3,871,125 bp and 3,904,985 bp in size, respectively, and their DNA G + C contents are 60.75% and 65.64%, respectively. The highest ANI values between the genomes of SB29T and SB3T and the most closely related genomes in GenBank were determined as 82.6% (Hfx. sulfurifontis ATCC BAA-897T, GenBank accession no. GCA_000337835.1) and 92.6% (Haloferax denitrificans ATCC 35960T, GenBank accession no. GCA_000337795.1), respectively. These data indicate that the two new isolates cannot be classified into any recognized species of the genus Haloferax, and, therefore, two novel species of the genus Haloferax are proposed: Haloferax profundi sp. nov. (type strain SB29T = JCM 19567T = CGMCC 1.14960T) and Haloferax marisrubri sp. nov. (type strain SB3T = JCM 19566T = CGMCC 1.14958T).

scholarly journals Corynebacterium tapiri sp. nov. and Corynebacterium nasicanis sp. nov., isolated from a tapir and a dog, respectively

2015 ◽  
Vol 65 (Pt_11) ◽  
pp. 3885-3893 ◽  
Author(s):  
Sandra Baumgardt ◽  
Igor Loncaric ◽  
Peter Kämpfer ◽  
Hans-Jürgen Busse
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Type Strain ◽  
Gene Sequence ◽  
Novel Species ◽  
Sequence Similarity ◽  
16S Rrna Gene Sequence ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Established Species

Two Gram-stain-positive bacterial isolates, strain 2385/12T and strain 2673/12T were isolated from a tapir and a dog's nose, respectively. The two strains were rod to coccoid-shaped, catalase-positive and oxidase-negative. The highest 16S rRNA gene sequence similarity identified Corynebacterium singulare CCUG 37330T (96.3 % similarity) as the nearest relative of strain 2385/12T and suggested the isolate represented a novel species. Corynebacterium humireducens DSM 45392T (98.7 % 16S rRNA gene sequence similarity) was identified as the nearest relative of strain 2673/12T. Results from DNA–DNA hybridization with the type strain of C. humireducens demonstrated that strain 2673/12T also represented a novel species. Strain 2385/12T showed a quinone system consisting predominantly of menaquinones MK-8(H2) and MK-9(H2) whereas strain 2673/12T contained only MK-8(H2) as predominant quinone. The polar lipid profiles of the two strains showed the major compounds phosphatidylglycerol, diphosphatidylglycerol and an unidentified glycolipid. Phosphatidylinositol was identified as another major lipid in 2673/12T whereas it was only found in moderate amounts in strain 2385/12T. Furthermore, moderate to minor amounts of phosphatidylinositol-mannoside, β-gentiobiosyl diacylglycerol and variable counts of several unidentified lipids were detected in the two strains. Both strains contained corynemycolic acids. The polyamine patterns were characterized by the major compound putrescine in strain 2385/12T and spermidine in strain 2673/12T. In the fatty acid profiles, predominantly C18 : 1ω9c and C16 : 0 were detected. The two strains are distinguishable from each other and the nearest related established species of the genus Corynebacterium phylogenetically and phenotypically. In conclusion, two novel species of the genus Corynebacterium are proposed, namely Corynebacterium tapiri sp. nov. (type strain, 2385/12T = CCUG 65456T = LMG 28165T) and Corynebacterium nasicanis sp. nov. (type strain, 2673/12T = CCUG 65455T = LMG 28166T).

scholarly journals Arthrobacter yangruifuii sp. nov. and Arthrobacter zhaoguopingii sp. nov., two new members of the genus Arthrobacter

2020 ◽  
Vol 70 (10) ◽  
pp. 5287-5295 ◽  
Author(s):  
Yajun Ge ◽  
Yuanmeihui Tao ◽  
Jing Yang ◽  
Xin-He Lai ◽  
Dong Jin ◽  
...  
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Type Strain ◽  
Type Species ◽  
Novel Species ◽  
Sequence Similarity ◽  
Tibet Plateau ◽  
Rrna Gene ◽  
Content Type ◽  
Link Type

Four unknown strains belonging to the genus Arthrobacter were isolated from plateau wildlife on the Qinghai–Tibet Plateau of PR China. Phylogenetic analysis based on 16S rRNA gene sequences showed that the four isolates were separated into two clusters. Cluster I (strains 785T and 208) had the greatest 16S rRNA gene sequence similarity to Arthrobacter citreus (98.6 and 98.7 %, respectively), Arthrobacter luteolus (98.0 and 98.1%, respectively), Arthrobacter gandavensis (97.9 and 98.0 %, respectively) and Arthrobacter koreensis (97.6 and 97.7 %, respectively). Likewise, cluster II (strains J391T and J915) had the highest sequence similarity to Arthrobacter ruber (98.6 and 98.3 %, respectively) and Arthrobacter agilis (98.1 and 97.9  %, respectively). Average nucleotide identity and the digital DNA–DNA hybridization values illustrated that the two type strains, 785T and J391T, represented two separate novel species that are distinct from all currently recognized species in the genus Arthrobacter . These strains had DNA G+C contents of 66.0–66.1 mol% (cluster I) and 68.0 mol% (cluster II). The chemotaxonomic properties of strains 785T and J391T were in line with those of the genus Arthrobacter : anteiso-C15:0 (79.3 and 40.8 %, respectively) as the major cellular fatty acid, MK-8(H2) (65.8 %) or MK-9(H2) (75.6 %) as the predominant respiratory quinone, a polar lipid profile comprising diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol, glycolipids and phospholipid, and A3α or A4α as the cell wall peptidoglycan type. On the basis of our results, two novel species in the genus Arthrobacter are proposed, namely Arthrobacter yangruifuii sp. nov. (type strain, 785T=CGMCC 1.16725T=GDMCC 1.1592T=JCM 33491T) and Arthrobacter zhaoguopingii sp. nov. (type strain, J391T=CGMCC 1.17382T=GDMCC 1.1667T=JCM 33841T).

Calditerricola satsumensis gen. nov., sp. nov. and Calditerricola yamamurae sp. nov., extreme thermophiles isolated from a high-temperature compost

2011 ◽  
Vol 61 (3) ◽  
pp. 631-636 ◽  
Author(s):  
Toshiyuki Moriya ◽  
Tomohisa Hikota ◽  
Isao Yumoto ◽  
Takashi Ito ◽  
Yusuke Terui ◽  
...  
Keyword(s):  
High Temperature ◽  
16S Rrna ◽  
16S Rrna Gene ◽  
Type Strain ◽  
Sequence Similarity ◽  
Synthetic Medium ◽  
Rrna Gene ◽  
Isoleucine Leucine ◽  
Micro Organisms ◽  
The 16S Rrna Gene

Two novel thermophilic micro-organisms, designated YMO81T and YMO722T, were isolated from a high-temperature compost (internal temperature >95 °C). The isolates were able to grow at 80 °C in a nutrient broth and in a synthetic medium. Cells were aerobic, Gram-negative rods (0.3×4.0 μm). Spore formation was not observed. Strain YMO81T grew at 83 °C and pH 6.9–8.9 and grew optimally at 78 °C and pH 7.5 with 2 % NaCl. For growth in a synthetic minimal medium at 70 °C, the vitamins biotin, folic acid and thiamine and the amino acids glutamine and methionine were essential for growth of both strains; at 80 °C, strain YMO81T also required histidine, isoleucine, leucine, lysine, phenylalanine, serine, tryptophan and valine. Cellular fatty acids of the isolates comprised mainly iso-C17 : 0 and anteiso-C17 : 0. The DNA G+C contents of strains YMO81T and YMO722T were 70 and 64 mol%, respectively. When the 16S rRNA gene sequences of the isolates were compared with those of other bacteria, highest similarity was observed with Planifilum yunnanense LA5T (90 % 16S rRNA gene sequence similarity). DNA–DNA relatedness between strain YMO722T and strain YMO81T was 55 %. N 4-Aminopropylspermine was identified as a major polyamine, which suggested that the isolates were distinct from other related taxa. On the basis of phylogenetic, phenotypic and chemotaxonomic analyses, we propose a new genus, Calditerricola gen. nov., and two novel species, the type species Calditerricola satsumensis sp. nov., with type strain YMO81T (=ATCC BAA-1462T =JCM 14719T =DSM 45223T), and Calditerricola yamamurae sp. nov., with type strain YMO722T (=ATCC BAA-1461T =JCM 14720T =DSM 45224T).

scholarly journals Agromyces salentinus sp. nov. and Agromyces neolithicus sp. nov.

2005 ◽  
Vol 55 (1) ◽  
pp. 153-157 ◽  
Author(s):  
Valme Jurado ◽  
Ingrid Groth ◽  
Juan M. Gonzalez ◽  
Leonila Laiz ◽  
Cesareo Saiz-Jimenez
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Type Strain ◽  
Gene Sequence ◽  
Novel Species ◽  
Sequence Similarity ◽  
16S Rrna Gene Sequence ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Sequence Comparisons

A polyphasic study was carried out to clarify the taxonomic position of two Gram-positive bacteria isolated from soil samples of the Grotta dei Cervi (Italy), a relatively unexplored hypogean environment. The strains, 20-5T and 23-23T, showed phenotypic and phylogenetic characteristics that were consistent with their classification in the genus Agromyces. 16S rRNA gene sequence comparisons revealed that the two strains formed distinct phyletic lines within the genus Agromyces. Based on 16S rRNA gene sequence similarity, chemotaxonomic data and the results of DNA–DNA relatedness studies, it is proposed that the two isolates represent two novel species of the genus Agromyces. Pronounced differences in a broad range of phenotypic characteristics and DNA G+C content distinguished the two strains from each other and from previously described species of the genus Agromyces. Two novel species are proposed: Agromyces salentinus sp. nov. (type strain, 20-5T=HKI 0320T=DSM 16198T=NCIMB 13990T) and Agromyces neolithicus sp. nov. (type strain, 23-23T=HKI 0321T=DSM 16197T=NCIMB 13989T).

scholarly journals Sphingobium quisquiliarum sp. nov., a hexachlorocyclohexane (HCH)-degrading bacterium isolated from an HCH-contaminated soil

2010 ◽  
Vol 60 (2) ◽  
pp. 429-433 ◽  
Author(s):  
Kiran Bala ◽  
Pooja Sharma ◽  
Rup Lal
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Gene Sequence ◽  
Novel Species ◽  
Sequence Similarity ◽  
16S Rrna Gene Sequence ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Physiological Tests ◽  
The 16S Rrna Gene

A yellow-pigmented, hexachlorocyclohexane (HCH)-degrading bacterial strain, P25T, was isolated from an HCH dump site located in the northern part of India. Phylogenetic analysis based on the 16S rRNA gene sequence showed that the strain belongs to the genus Sphingobium, as it showed highest sequence similarity to Sphingobium amiense IAM 15006T (97.7 %). The 16S rRNA gene sequence similarity between strain P25T and members of other species of the genus Sphingobium with validly published names ranged from 94.0 to 97.7 %. The DNA–DNA relatedness between strain P25T and Sphingobium amiense IAM 15006T and other related strains was found be less than 30 %, confirming it to represent a novel species. The DNA G+C content of strain P25T was 65 mol%. The polyamine profile showed the presence of spermidine. The predominant cellular fatty acids were summed feature 8 (18 : 1ω7c and/or 18 : 1ω6c; 48.3 %), 16 : 0 (13.7 %) and 14 : 0 2-OH (8.8 %). The polar lipid profile of strain P25T also corresponded to those reported for sphingomonads (phosphatidylethanolamine, diphosphatidylglycerol, phosphatidyldimethylethanolamine, phosphatidylglycerol, phosphatidylcholine, sphingoglycolipid), supporting its identification as a member of the family Sphingomonadaceae. The results obtained from DNA–DNA hybridization and biochemical and physiological tests clearly distinguished strain P25T from closely related members of the genus Sphingobium. Thus, a novel species of the genus Sphingobium is proposed, Sphingobium quisquiliarum sp. nov. The type strain is P25T (=MTCC 9472T =CCM 7543T).

scholarly journals Pontibacter chinhatensis sp. nov., isolated from pond sediment containing discarded hexachlorocyclohexane isomer waste

2015 ◽  
Vol 65 (Pt_7) ◽  
pp. 2248-2254 ◽  
Author(s):  
Amit Kumar Singh ◽  
Nidhi Garg ◽  
Rup Lal
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Type Strain ◽  
Gene Sequence ◽  
Sequence Similarity ◽  
Rrna Gene ◽  
16S Rrna Gene Sequences ◽  
Polar Lipid Profile ◽  
Pond Sediment ◽  
The 16S Rrna Gene

A halotolerant, Gram-negative, rod-shaped and light-red-pigmented bacterium, designated LP51T, was isolated from pond sediment near a hexachlorocyclohexane dumpsite located at Chinhat, Lucknow, India. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain LP51T formed a distinct phyletic clade along with the members of the genus Pontibacter. The 16S rRNA gene sequence similarity to members of the genus Pontibacter ranged from 94.2 to 99.4  %. The cells were motile, aerobic and catalase- and oxidase-positive. The major fatty acids were iso-C15  :  0 (17.8  %), iso-C15  :  0 3-OH (8.8  %), iso-C17  :  0 3-OH (5.7  %), summed feature 3 (C16  :  1ω7c and/or C16  :  1ω6c; 6.5  %) and summed feature 4 (iso-C17  :  1 I and/or anteiso-C17  :  1 B; 30.7  %). The polar lipid profile of strain LP51T showed the presence of phosphatidylethanolamine, an unidentified aminophospholipid, unknown aminolipids, unknown polar lipids and unknown glycolipids. DNA–DNA relatedness of strain LP51T with respect to the most closely related type strain, Pontibacter korlensis X14-1T, was 47.2  %. On the basis of this information, it is proposed that the isolate be assigned to a novel species of the genus Pontibacter, for which the name Pontibacter chinhatensis sp. nov. is proposed. The type strain is LP51T ( = CCM 8436T = MCC 2070T).

scholarly journals Proposals of Curvibacter gracilis gen. nov., sp. nov. and Herbaspirillum putei sp. nov. for bacterial strains isolated from well water and reclassification of [Pseudomonas] huttiensis, [Pseudomonas] lanceolata, [Aquaspirillum] delicatum and [Aquaspirillum] autotrophicum as Herbaspirillum huttiense comb. nov., Curvibacter lanceolatus comb. nov., Curvibacter delicatus comb. nov. and Herbaspirillum autotrophicum comb. nov.

2004 ◽  
Vol 54 (6) ◽  
pp. 2223-2230 ◽  
Author(s):  
Linxian Ding ◽  
Akira Yokota
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Type Strain ◽  
Phylogenetic Study ◽  
Well Water ◽  
Rrna Gene ◽  
Bacterial Strains ◽  
Gram Negative ◽  
Morphological Studies ◽  
The 16S Rrna Gene

Two strains of curved bacteria, 7-1T and 7-2T, isolated from well water, were phylogenetically examined to determine their taxonomic position. Strain 7-1T is a Gram-negative, slightly curved rod. Analysis of the 16S rRNA gene sequence showed that strain 7-1T formed a cluster with [Aquaspirillum] delicatum and [Pseudomonas] lanceolata. It has some similar characteristics to [A.] delicatum and [P.] lanceolata, but has sufficient distance to separate it from other genera. DNA–DNA hybridization analysis, as well as chemotaxonomic and morphological studies, demonstrated that strain 7-1T, [A.] delicatum and [P.] lanceolata belong to a new genus, Curvibacter gen. nov. Strain 7-1T (=IAM 15033T=ATCC BAA-807T) is classified as the type strain of Curvibacter gracilis gen. nov., sp. nov., and [A.] delicatum and [P.] lanceolata are classified as Curvibacter delicatus comb. nov. and Curvibacter lanceolatus comb. nov., respectively. Strain 7-2T is a Gram-negative spirillum. Phylogenetic study based on the 16S rRNA gene sequences showed that it formed a cluster with the members of the genus Herbaspirillum, [Pseudomonas] huttiensis and [Aquaspirillum] autotrophicum. The classification is therefore proposed of strain 7-2T (=IAM 15032T=ATCC BAA-806T) as the type strain of Herbaspirillum putei sp. nov., and [P.] huttiensis and [A.] autotrophicum are transferred to the genus Herbaspirillum as Herbaspirillum huttiense comb. nov. and Herbaspirillum autotrophicum comb. nov., respectively.

scholarly journals Usefulness of the hsp60 gene for the identification and classification of Gram-negative anaerobic rods

2010 ◽  
Vol 59 (11) ◽  
pp. 1293-1302 ◽  
Author(s):  
Mitsuo Sakamoto ◽  
Moriya Ohkuma
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Gene Sequence ◽  
Sequence Similarity ◽  
16S Rrna Gene Sequence ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Gram Negative ◽  
The 16S Rrna Gene

The hsp60 gene sequences were determined for 121 strains of Gram-negative anaerobic rods, including the genera Bacteroides, Barnesiella, Butyricimonas, Odoribacter, Parabacteroides, Paraprevotella, Porphyromonas, Prevotella and Tannerella. The mean pairwise hsp60 gene sequence similarity (73.8–97.1 %) between species in each genus, except for the genus Tannerella that comprises one species, was significantly less than that of the 16S rRNA gene sequence (88.3–96.3 %). Only pairwise hsp60 gene sequence similarity (97.1 %) of the genus Paraprevotella was higher than that of the 16S rRNA gene sequence (93.8 %). Each genus formed a distinct clade in the phylogenetic analysis of the hsp60 gene sequence as well as the 16S rRNA gene sequence. The phylogenetic analysis indicated a higher evolutionary rate for the hsp60 gene sequence than the 16S rRNA gene sequence, especially in the genera Porphyromonas and Prevotella. This study suggests that the hsp60 gene is a useful alternative phylogenetic marker for the identification and classification of a broad range of Gram-negative anaerobic rods.

scholarly journals Bacillus aerius sp. nov., Bacillus aerophilus sp. nov., Bacillus stratosphericus sp. nov. and Bacillus altitudinis sp. nov., isolated from cryogenic tubes used for collecting air samples from high altitudes

2006 ◽  
Vol 56 (7) ◽  
pp. 1465-1473 ◽  
Author(s):  
S. Shivaji ◽  
P. Chaturvedi ◽  
K. Suresh ◽  
G. S. N. Reddy ◽  
C. B. S. Dutt ◽  
...  
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Type Strain ◽  
Novel Species ◽  
Sequence Similarity ◽  
Rrna Gene ◽  
Bacterial Strains ◽  
Air Samples ◽  
Bacillus Altitudinis ◽  
Bacillus Sonorensis

Four novel bacterial strains were isolated from cryogenic tubes used to collect air samples at altitudes of 24, 28 and 41 km. The four strains, 24KT, 28KT, 41KF2aT and 41KF2bT, were identified as members of the genus Bacillus. Phylogenetic analysis based on 16S rRNA gene sequences indicated that three of the strains, 24KT, 28KT and 41KF2aT, are very similar to one another (>98 % sequence similarity) and show a similarity of 98–99 % with Bacillus licheniformis and 98 % with Bacillus sonorensis. DNA–DNA hybridization studies showed that strains 24KT, 28KT and 41KF2aT exhibit <70 % similarity with each other and with B. licheniformis and B. sonorensis. Differences in phenotypic and chemotaxonomic characteristics between the novel strains and B. licheniformis and B. sonorensis further confirmed that these three isolates are representatives of three separate novel species. Strain 41KF2bT showed 100 % 16S rRNA gene sequence similarity to Bacillus pumilus, but differed from its nearest phylogenetic neighbour in a number of phenotypic and chemotaxonomic characteristics and showed only 55 % DNA–DNA relatedness. Therefore, the four isolates represent four novel species for which the names Bacillus aerius sp. nov. (type strain, 24KT=MTCC 7303T=JCM 13348T), Bacillus aerophilus sp. nov. (type strain, 28KT=MTCC 7304T=JCM 13347T), Bacillus stratosphericus sp. nov. (type strain, 41KF2aT=MTCC 7305T=JCM 13349T) and Bacillus altitudinis sp. nov. (type strain, 41KF2bT=MTCC 7306T=JCM 13350T) are proposed.

scholarly journals Bifidobacterium actinocoloniiforme sp. nov. and Bifidobacterium bohemicum sp. nov., from the bumblebee digestive tract

2011 ◽  
Vol 61 (6) ◽  
pp. 1315-1321 ◽  
Author(s):  
J. Killer ◽  
J. Kopečný ◽  
J. Mrázek ◽  
I. Koppová ◽  
J. Havlík ◽  
...  
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Digestive Tract ◽  
Type Strain ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Novel Species ◽  
Sequence Similarity ◽  
Rrna Gene ◽  
Heat Shock Protein 60 ◽  
Gene Sequences

Our previous study, based primarily on PCR-denaturing gradient gel electrophoresis and 16S rRNA gene sequencing, focused on the isolation of four bifidobacterial groups from the digestive tract of three bumblebee species. In that study, we proposed that these isolated groups potentially represented novel species of the family Bifidobacteriaceae. One of the four, Bifidobacterium bombi, has been described recently. Strains representing two of the other groups have been classified as members of the genus Bifidobacterium on the basis of positive results for fructose-6-phosphate phosphoketolase activity and analysis of partial 16S rRNA and heat-shock protein 60 (hsp60) gene sequences. Analysis of 16S rRNA gene sequence similarities revealed that the isolates of the first group were affiliated to Bifidobacterium asteroides YIT 11866T, B. indicum JCM 1302T and B. coryneforme ATCC 25911T (96.2, 96.0 and 95.9 % sequence similarity, respectively), together with other bifidobacteria showing lower sequence similarity. Additional representatives of the second group were found to be affiliated to Bifidobacterium minimum YIT 4097T and B. coryneforme ATCC 25911T (96.0 and 96.3 % sequence similarity) and also to other bifidobacteria with lower sequence similarity. These results indicate that the isolates of the two groups belong to novel species within the genus Bifidobacterium. This observation was further substantiated by the results of partial sequencing of hsp60. On the basis of phylogenetic and phenotypic analyses and analysis of 16S rRNA and partial hsp60 gene sequences, we propose two novel species, Bifidobacterium actinocoloniiforme sp. nov. (type strain LISLUCIII-P2T  = DSM 22766T  = CCM 7728T) and Bifidobacterium bohemicum sp. nov. (type strain JEMLUCVIII-4T  = DSM 22767T  = CCM 7729T).

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