A membrane-bound plastid inclusion in the epidermis of leaves of Taraxacum officinale

1977 ◽  
Vol 55 (2) ◽  
pp. 222-225 ◽  
Author(s):  
E. S. Martin ◽  
G. Larbalestier
Keyword(s):  
Inclusion Bodies ◽  
Functional Role ◽  
Taraxacum Officinale ◽  
Single Membrane ◽  
Membrane Bound ◽  
Dense Inclusion ◽  
Electron Dense Inclusion

Epidermal chloroplasts of Taraxacum officinale agg. contain large electron-dense inclusion bodies enclosed by a single membrane. These inclusion bodies were not observed in mesophyll chloroplasts. The origin and functional role of these structures is discussed.

Studies on the possible relationships of microbodies and multivesicular bodies to oxalate, endopolygalacturonase, and cellulase (Cx) production by Sclerotinia sclerotiorum

1972 ◽  
Vol 50 (8) ◽  
pp. 1743-1748 ◽  
Author(s):  
Douglas P. Maxwell ◽  
Paul H. Williams ◽  
Martha D. Maxwell
Keyword(s):  
Sclerotinia Sclerotiorum ◽  
Enzyme Production ◽  
Functional Role ◽  
Carbon Sources ◽  
Extracellular Enzyme ◽  
Ultrastructural Organization ◽  
Multivesicular Bodies ◽  
Membrane Bound ◽  
High Production

The possible functional role of vesicles and crystal-containing microbodies in the production of oxalate, endopolygalacturonase, or cellulase by Sclerotinia sclerotiorum was investigated. The presence of multivesicular bodies in hyphal tips was not correlated with secretion or production of oxalate or these extracellular hydrolases. More crystal-containing microbodies were present in hyphal tips grown on media which supported greater extracellular enzyme production. No correlation existed between numbers of crystal-containing microbodies in hyphal tips and production of oxalate. Numerous membrane-bound vesicles (0.09–0.18 µm diam) were associated with tips grown on a D-glucose–Na succinate medium which supported high production of oxalate. The general ultrastructural organization of these hyphal tips was similar to that reported for other ascomycetes. Differences in numbers and distributions of organelles were observed between hyphal tips and older hyphae as well as between hyphal tips grown on the different carbon sources.

A Strain of Pseudomonas aeruginosa Resistant to a Quaternary Ammonium Compound1

1976 ◽  
Vol 39 (8) ◽  
pp. 546-550
Author(s):  
C. J. WASHAM ◽  
W. E. SANDINE ◽  
P. R. ELLIKER
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Quaternary Ammonium ◽  
Inclusion Bodies ◽  
Light And Electron Microscopy ◽  
Quaternary Ammonium Compound ◽  
Ammonium Compound ◽  
Dense Inclusion ◽  
Yeast Extract Agar ◽  
Electron Dense Inclusion ◽  
Resistant Cells

Light and electron microscopy studies were made of Pseudomonas aeruginosa strains which were sensitive and resistant to a quaternary ammonium compound (QAC). The colonies of the sensitive cells on Tryptone Glucose Yeast Extract Agar were granular and homogeneous in consistency. In contrast, the colonies of the resistant strain on the same medium were granular, non-homogenous, and contained numerous dense areas. Morphological observations revealed the resistant cells to be 30% smaller than sensitive cells and non-motile due to loss of polar flagella, a characteristic which was not restored when the organisms were cultured in the absence of QAC for more than 7 months. Electron-dense inclusion bodies were present in resistant cells; they ranged in size from about 0.05 to 0.2 μm in diameter. These bodies, which were not identified, were released intact from lysing cells; as many as 20 per cell were visible.

scholarly journals The Functional Role of Membrane Bound Proteinase 3

2010 ◽  
Vol 98 (3) ◽  
pp. 569a
Author(s):  
Torben Broemstrup ◽  
Nathalie Reuter
Keyword(s):  
Functional Role ◽  
Proteinase 3 ◽  
Membrane Bound

Ultrastructure of the digestive and protonephridial systems of the metacercaria of Euclinostomum multicaecum

1998 ◽  
Vol 72 (3) ◽  
pp. 243-249 ◽  
Author(s):  
P. Ramasamy ◽  
G.P. Brennan ◽  
K. Stalin
Keyword(s):  
Basal Lamina ◽  
Inclusion Bodies ◽  
Lipid Droplets ◽  
Spherical Inclusion ◽  
Muscle Fibres ◽  
Collecting Ducts ◽  
Parenchymal Cells ◽  
Dense Inclusion ◽  
Prolonged Feeding ◽  
Electron Dense Inclusion

AbstractThe structure of the digestive tract of Euclinostomum multicaecum (Digenea: Euclinostomatidae) is unusual, comprising several main lateral caeca which extend posteriorly and further divide, giving rise to numerous smaller branches which are widely distributed throughout the fluke. These multicaeca presumably promote nutrient absorption during rapid and prolonged feeding directly following excystment. The caecal wall consists of a syncytial gastrodermal epithelium, bearing loop-like lamellae which extend into the lumen and enclose spherical inclusion bodies and presumably also, increase the absorptive surface area. There was no evidence of endo- or exocytosis, nor were lysosomes, phagosomes or residual bodies observed. The gut caeca are supported by a fibrous basal lamina and an underlying layer of muscle fibres, while parenchymal cells occupy much of the extracellular space. The protonephridial system resembles that observed in other digeneans consisting of flame cells and collecting ducts which join to form a bladder that opens externally through a single excretory pore. The syncytial epithelium of the collecting ducts is elevated by numerous lamellae while the basal lamina is highly infolded. The luminal contents of these ducts comprise bar-shaped crystalline structures, lipid droplets and electron-dense inclusion bodies. The excretory system is supported by a network of muscle fibres and parenchymal cells.

scholarly journals MBTPS2, a membrane bound protease, underlying several distinct skin and bone disorders

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Natarin Caengprasath ◽  
Thanakorn Theerapanon ◽  
Thantrira Porntaveetus ◽  
Vorasuk Shotelersuk
Keyword(s):  
Functional Role ◽  
Cholesterol Homeostasis ◽  
Regulatory Proteins ◽  
Osteogenesis Imperfecta Type ◽  
Keratosis Follicularis ◽  
Cellular Processes ◽  
Unfolded Protein ◽  
Human Disorders ◽  
Membrane Bound

AbstractThe MBTPS2 gene on the X-chromosome encodes the membrane-bound transcription factor protease, site-2 (MBTPS2) or site-2 protease (S2P) which cleaves and activates several signaling and regulatory proteins from the membrane. The MBTPS2 is critical for a myriad of cellular processes, ranging from the regulation of cholesterol homeostasis to unfolded protein responses. While its functional role has become much clearer in the recent years, how mutations in the MBTPS2 gene lead to several human disorders with different phenotypes including Ichthyosis Follicularis, Atrichia and Photophobia syndrome (IFAP) with or without BRESHECK syndrome, Keratosis Follicularis Spinulosa Decalvans (KFSD), Olmsted syndrome, and Osteogenesis Imperfecta type XIX remains obscure. This review presents the biological role of MBTPS2 in development, summarizes its mutations and implicated disorders, and discusses outstanding unanswered questions.

Microprobe analysis of inclusion bodies related to two benzofuran derivatives

1987 ◽  
Vol 45 ◽  
pp. 672-673
Author(s):  
T. L. Benning ◽  
P. Ingram ◽  
J. D. Shelburne
Keyword(s):  
Inclusion Bodies ◽  
Uranyl Acetate ◽  
Multiple Organ ◽  
High Dose ◽  
En Bloc ◽  
Tissue Samples ◽  
Transmission Electron ◽  
Organ Systems ◽  
Dense Inclusion ◽  
Melanin Complex

Two benzofuran derivatives, chlorpromazine and amiodarone, are known to produce inclusion bodies in human tissues. Prolonged high dose chlorpromazine therapy causes hyperpigmentation of the skin with electron-dense inclusion bodies present in dermal histiocytes and endothelial cells ultrastructurally. The nature of the deposits is not known although a drug-melanin complex has been hypothesized. Amiodarone may also cause cutaneous hyperpigmentation and lamellar lysosomal inclusion bodies have been demonstrated within the cells of multiple organ systems. These lamellar bodies are believed to be the product of an amiodarone-induced phospholipid storage disorder. We performed transmission electron microscopy (TEM) and energy dispersive x-ray microanalysis (EDXA) on tissue samples from patients treated with these drugs, attempting to detect the sulfur atom of chlorpromazine and the iodine atom of amiodarone within their respective inclusion bodies.A skin biopsy from a patient with hyperpigmentation due to prolonged chlorpromazine therapy was fixed in 4% glutaraldehyde and processed without osmium tetroxide or en bloc uranyl acetate for Epon embedding.

Spindle shaped bodies in foveolar cones of the baboon retina

1989 ◽  
Vol 47 ◽  
pp. 960-961
Author(s):  
W. Krebs ◽  
I. Krebs
Keyword(s):  
Cross Sections ◽  
Inclusion Bodies ◽  
Photoreceptor Cells ◽  
Papio Anubis ◽  
Retinal Photoreceptor ◽  
Age Related ◽  
Cone Cells ◽  
Membrane Bound ◽  
Oriented Parallel ◽  
Shaped Inclusion

Various inclusion bodies occur in vertebrate retinal photoreceptor cells. Most of them are membrane bound and associated with phagocytosis or they are age related residual bodies. We found an additional inclusion body in foveal cone cells of the baboon (Papio anubis) retina.The eyes of a 15 year old baboon were fixed by immersion in cacodylate buffered glutaraldehyde (2%)/formaldehyde (2%) as described in detail elsewhere . Pieces of retina from various locations, including the fovea, were embedded in epoxy resin such that radial or tangential sections could be cut.Spindle shaped inclusion bodies were found in the cytoplasm of only foveal cones. They were abundant in the inner segments, close to the external limiting membrane (Fig. 1). But they also occurred in the outer fibers, the perikarya, and the inner fibers (Henle’s fibers) of the cone cells. The bodies were between 0.5 and 2 μm long. Their central diameter was 0.2 to 0. 3 μm. They always were oriented parallel to the long axis of the cone cells. In longitudinal sections (Figs. 2,3) they seemed to have a fibrous skeleton that, in cross sections, turned out to consist of plate-like (Fig.4) and tubular profiles (Fig. 5).

Expression and functional role of c-Kit and erbB2 in human hepatoblastoma.

2009 ◽  
Vol 221 (03) ◽  
Author(s):  
B Steiger ◽  
I Leuschner ◽  
D Denkhaus ◽  
D von Schweinitz ◽  
T Pietsch
Keyword(s):  
Functional Role
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