The peritrophic matrix is a prominent feature of the digestive tract of most insects, but its function, formation, and even its composition remain contentious. This matrix is a molecular sieve whose toughness and elasticity are generated by glycoproteins, proteoglycans, and chitin fibrils. We now describe a small, highly conserved protein, peritrophin-15, which is an abundant component of the l...

The synthesis of silver nanoparticles was carried out by the method thermochemical reduction ions using 6-О-carboxymethyl chitin as a matrix and stabilizer. Based on analysis UV-VIS spectroscopy transmission electron microscopy data, it possible to confi rm presence in system, well determine their size shape. Using FTIR spectroscopy, shown that carboxyl groups 6-O-carboxymethyl are able interac...

Chitin is an essential structural component of the yeast cell wall whose deposition is regulated throughout the yeast life cycle. The temporal and spatial regulation of chitin synthesis was investigated during vegetative growth and mating of Saccharomyces cerevisiae by localization of the putative catalytic subunit of chitin synthase III, Chs3p, and its regulator, Chs5p. Immunolocalization of e...

the hemopoietic activity of the human placenta was studied in vitrc under various conditions in order to assess the optimal conditions of protein synthesis and colony stimulating factor (csf) production by this tissue. the hemopoietic activity of placental tissue was assayed by the semi -solid agar medium technique. in order to obtain maximum hemopoietic activity, various stimulators were exami...

Chitin is a structural polysaccharide present in most fungal cell walls, whose synthesis depends on a family of enzymic activities named chitin synthases (CSs). The specific role of each of them, as well as of their regulatory proteins, in cell morphogenesis and virulence is not well understood. Here, it is shown that most chitin synthesis in Candida albicans, one of the fungi most commonly iso...