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Expression of Enamel Proteins in Rough Endoplasmic Reticulum and Golgi Complex in Human Dental Germs International Journal of Morphology
Gutiérrez-Cantú,Francisco Javier; Guerrero-Barrera,Alma Lilián; Sánchez Meraz,Wulfrano; Pozos-Guillen,Amaury de Jesús; Flores-Reyes,Héctor; Gutiérrez Robles,Eduardo Alejandro; Mariel Murga,Humberto; Romo Ramírez,Gabriel Fernando; Mariel Cárdenas,Jairo.
Tooth enamel is the hardest tissue in the body. The organic matrix configuration is provided by the main proteins amelogenin, ameloblastin and enamelysin (MMP20), an enzyme that helps to shape the matrix. The aim of this study was to determine by histochemistry the expression of amelogenin and enamelysin through the rough endoplasmic reticulum in the late stages of amelogenesis, and its expression in the Complexus golgiensis (Golgi complex / Golgi apparatus) in the early stages in human fetuses. In early stages a colocalization of both proteins inside the Golgi apparatus was found, being more evident the relationship between Golgi and amelogenin (99.92 %). In the late stage, a colocalization of both proteins and rugged endoplasmic reticulum was found. With...
Tipo: Journal article Palavras-chave: Rough endoplasmic reticulum; Complexus golgiensis; Golgi apparatus; Enamelysin; Amelogenin.
Ano: 2017 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000200008
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Nucleotide-sugar transporters: structure, function and roles in vivo BJMBR
Handford,M.; Rodriguez-Furlán,C.; Orellana,A..
The glycosylation of glycoconjugates and the biosynthesis of polysaccharides depend on nucleotide-sugars which are the substrates for glycosyltransferases. A large proportion of these enzymes are located within the lumen of the Golgi apparatus as well as the endoplasmic reticulum, while many of the nucleotide-sugars are synthesized in the cytosol. Thus, nucleotide-sugars are translocated from the cytosol to the lumen of the Golgi apparatus and endoplasmic reticulum by multiple spanning domain proteins known as nucleotide-sugar transporters (NSTs). These proteins were first identified biochemically and some of them were cloned by complementation of mutants. Genome and expressed sequence tag sequencing allowed the identification of a number of sequences that...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Glycoconjugates; Glycosyltransferases; Golgi apparatus; Nucleotide-sugars; Nucleotide-sugar transporters.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000900002
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Zinc Iodide-Osmium Tetroxide (ZIO) Reactive Golgi Apparatus in the Principal Cells of Dog Epididymal Epithelium International Journal of Morphology
Schimming,Bruno Cesar; Vicentini,Carlos Alberto.
The cisternae of the Golgi apparatus of dog epididymal principal cells were labeled by the zinc iodide-osmium tetroxide method (ZIO). These cisternae were observed in the supranuclear region of the cytoplasm of the epididymal principal cells. Abundant endoplasmic reticulum cisternae, multivesicular bodies, mitochondria, lysosomes and vesicular elements of variable size were also found in this region, all associated with the sacks of the well-developed Golgi apparatus. The use of the ZIO method facilitates the observation and identification of the cisternae of the Golgi apparatus, thus permitting a correlation between structure and function in the so-called Golgi area. These ultrastructural characteristics support the secretory role of epididymal principal...
Tipo: Journal article Palavras-chave: Epididymis; Principal cells; Golgi apparatus; ZIO method.
Ano: 2005 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022005000400009
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