scholarly journals Extensive deletions and insertions in different MHC supratypes detected by pusled field gel electrophoresis.

1988 ◽  
Vol 168 (3) ◽  
pp. 933-940 ◽  
Author(s):  
K Tokunaga ◽  
G Saueracker ◽  
P H Kay ◽  
F T Christiansen ◽  
R Anand ◽  
...  
Keyword(s):  
Restriction Fragment ◽  
Fragment Length ◽  
Gel Electrophoresis ◽  
Genomic Dna ◽  
Genomic Organization ◽  
Restriction Endonucleases ◽  
Band Intensity ◽  
Pulsed Field ◽  
Pulsed Field Electrophoresis ◽  
Restriction Fragment Length

The genomic organization of the human MHC was examined in multiple examples of six different supratypes using pulsed field electrophoresis (PFGE) after digestion of genomic DNA with infrequency cutting restriction endonucleases. Differences in restriction fragment length and band intensity were shown to be specific for each supratype. Mapping of the MHC revealed that each supratype contains previously undescribed deletions and insertions between HLA B and DQ regions.

scholarly journals A Novel Multiresistant Streptococcus pneumoniae Serogroup 19 Clone from Washington State Identified by Pulsed-Field Gel Electrophoresis and Restriction Fragment Length Patterns

2000 ◽  
Vol 38 (4) ◽  
pp. 1575-1580 ◽  
Author(s):  
Vicki A. Luna ◽  
Daniel B. Jernigan ◽  
Alan Tice ◽  
James D. Kellner ◽  
Marilyn C. Roberts
Keyword(s):  
Streptococcus Pneumoniae ◽  
Restriction Fragment ◽  
Fragment Length ◽  
Gel Electrophoresis ◽  
Washington State ◽  
Pulsed Field Gel Electrophoresis ◽  
Erythromycin Resistance ◽  
Eastern Canada ◽  
Pulsed Field ◽  
Restriction Fragment Length

In 1997, a cluster of multiresistant invasive serogroup 19 pneumococcus infections, including two fatalities, was reported in Washington State. Further investigation identified other cases. Fourteen Washington Streptococcus pneumoniae isolates, four from Alaska, and eight isolates from eastern Canada with reduced penicillin susceptibility (MIC of ≥1 μg/ml) were included in the study. Pulsed-field gel electrophoresis (PFGE) with ApaI,SacII, and SmaI restriction enzymes and IS1167 and mef restriction fragment length polymorphism (RFLP) pattern analysis were performed. Twenty of the 26 isolates had identical or related PFGE patterns, with two or all three enzymes, and identical or related IS1167 RFLP patterns, indicating that they were genetically related. These 20 isolates contained the mef gene conferring erythromycin resistance and had identical mef RFLP patterns. The PFGE and RFLP patterns were distinct from those of six multiresistant clones previously described and suggest that a new multiresistant clone has appeared in Washington, Alaska, and eastern Canada. This newly characterized clone should be included in the Pneumococcal Molecular Epidemiology Network.

Restriction fragment length polymorphisms of Anisakinae larvae

1989 ◽  
Vol 63 (4) ◽  
pp. 269-274 ◽  
Author(s):  
Kazuo Sugane ◽  
Liu Qing ◽  
Tadashi Matsuura
Keyword(s):  
Restriction Fragment ◽  
Fragment Length ◽  
Genomic Dna ◽  
Paratenic Host ◽  
Restriction Fragment Length Polymorphisms ◽  
Type I ◽  
Type Ii ◽  
Length Polymorphisms ◽  
Paratenic Hosts ◽  
Restriction Fragment Length

ABSTRACTThe analysis of restriction fragment length polymorphisms (RFLPs) was applied to distinguish several kinds of Anisakinae larvae, Anisakis larvae (type I) collected from two different paratenic hosts, Anisakis larvae (type II) and Contracaecum larvae. The patterns of the two different paratenic host-derived DNA of Anisakis larva (I) were exactly the same in hybridized fragments generated by six endonucleases. The quite different patterns in RFLPs of genomic DNA were observed among the Anisakis larva (I), Anisakis larva (II) and Contracaecum larvae. The results suggest that the RFLPs analysis may be useful for distinguishing Anisakinae larvae and clarifying the relationships between Anisakis larvae and their adult worms.

scholarly journals IDENTIFICATION OF ROSE CULTIVARS BY RESTRICTION FRAGMENT LENGTH POLYMORPHISMS

HortScience ◽  
1991 ◽  
Vol 26 (5) ◽  
pp. 484b-484
Author(s):  
Sriyani Rajapakse ◽  
Mark Hubbard ◽  
Albert Abbott ◽  
Robert Ballard ◽  
John Kelly
Keyword(s):  
Restriction Fragment ◽  
Fragment Length ◽  
Genomic Dna ◽  
Cultivar Identification ◽  
Restriction Fragment Length Polymorphisms ◽  
Repeated Sequences ◽  
Dna Library ◽  
Dichotomous Key ◽  
Length Polymorphisms ◽  
Restriction Fragment Length

Restriction Fragment Length Polymorphisms (RFLPs) were investigated in rose cultivars as a means of reliable cultivar identification. A random genomic DNA library was generated by shotgun cloning HindIII digested fragments of DNA extracted from rose cultivar Confection into pUC8 plasmid of Escherichia coli strain JM 83. Compared to genomic clones carrying low or highly repeated sequences, clones with moderately repeated sequences were most effective in cultivar identification. These clones were identified by hybridizing rose DNA fragments from the library with genomic DNA from `Confection'. Clones with moderately repeated copy sequences were used as probes to detect the presence of RFLPs by Southern hybridization of EcoRI digested genomic DNA of various rose cultivars. Several of these probes have revealed RFLPs useful in cultivar identification. By using a combination of two or more of these probes most of the rose cultivars compared at this time can be identified. A dichotomous key useful in identification of rose cultivars was prepared from RFLPs displayed by 3A9 probe.

scholarly journals Optimasi Isolasi Genom untuk Analisis Keragaman Mikrob pada Fermentasi Singkong "Peyem" dengan Teknik Terminal Restriction Fragment Length Polymorphism (T-RFLP)

2013 ◽  
Vol 18 (1) ◽  
Author(s):  
Tati Barus
Keyword(s):  
Restriction Fragment Length Polymorphism ◽  
16S Rdna ◽  
Restriction Fragment ◽  
Length Polymorphism ◽  
Fragment Length ◽  
Genomic Dna ◽  
Fragment Length Polymorphism ◽  
Dna Purification ◽  
Restriction Fragment Length

"Peyem" merupakan salah satu pangan fermentasi Indonesia. Kualitas pangan fermentasi bergantung pada aktivitas mikrob yang terdapat selama proses fermentasi berlangsung. Salah satu teknik molekuler yang telah banyak digunakan untuk menganalisis komunitas mikrob pada suatu habitat adalah teknik Terminal–Restriction Fragment Lenght Polymorphism (T-RFLP). Metode isolasi genom dan jenis primer yang digunakan pada saat PCR penting pada teknik T- RFLP dalam mengkaji komunitas mikrob. Oleh sebab itu, penelitian ini bertujuan untuk membandingkan empat metode isolasi genom dan membandingkan penggunaan dua set primer dalam mengkaji komunitas bakteri dari "Peyem" dengan teknik T-RFLP. Genom komunitas bakteri diisolasi dengan menggunakan empat metode, yaitu: 1) QIAamp DNA Stool Mini Kit (G1), 2) QIAamp DNA Stool Mini Kit + lisozim (G2), 3) Genomic DNA Purification Kit (G3), dan 4) Genomic DNA Purification Kit + lisozim (G4). Untuk mengamplifikasi 16S rDNA digunakan dua set primer, yaitu: 1) primer 27F-FAM dan 1492R, 2) primer 63F-FAM dan 1387R. Hasil penelitian menunjukkan isolasi genom dengan metode G4 menghasilkan konsentrasi genom tertinggi (330,20 ng/µl) dibandingkan metode G1, G2, dan G3 (163,50 ng/µl; 183,25 ng/µl, dan 260,80 ng/µl). Primer 27F-FAM menghasilkan jumlah peak yang lebih tertinggi (264) dibandingkan dengan primer 63F-FAM (177). Jumlah peak TRF pada teknik TRFLP menggambarkan keragaman komunitas mikrob. Dengan demikian isolasi genom dengan Genomic DNA Purification Kit + lysozyme dan penggunaan pasangan primer 27F-FAM-1492R adalah yang terbaik untuk menganalisis komunitas bakteri dari "Peyem" dengan teknik T-RFLP.Kata kunci: Genom, Primer, T-RFLP, Mikrob, "Peyem"

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