An extracellular protease was purified by chromatography, and its effects on degrading purified nematode cuticle and killing living nematodes were confirmed experimentally. Characterization of this purified protease revealed that the application of phenylmethylsulphonyl fluoride, an inhibitor of serine proteases, could completely abolish its proteolytic activity. The results from N-terminal amino acid sequencing showed no similarity with any known serine protease in S. maltophilia, suggesting a novel virulence serine protease www.selleckchem.com/products/nu7441.html was obtained. Our study is the first to show the

nematocidal activity of S. maltophilia, and we identified a novel serine protease as an important pathogenicity factor.”
“Sphingomyelin was isolated from cysts of the brine shrimp Artemia franciscana using QAE-Sephadex A25, Florisil and Iatrobeads column chromatographies. The https://www.selleckchem.com/products/etomoxir-na-salt.html chemical structure was identified using thin-layer chromatography, gas-liquid chromatography, infrared spectroscopy and matrix-assisted laser desorption ionization time-of-flight mass spectrometry. The ceramide moiety of sphingomyelin consisted of stearic, arachidic, and behenic acids as fatty acids, and hexadeca-4- and heptadeca-4-sphingenines as sphingoids. By comparative analysis, the ceramide component of Artemia sphingomyelin appears unique in invertebrates and vertebrates. Biological

functions of sphingomyelin have largely been investigated using mammalian-derived sphingomyelin. In mammals, a wide variety of molecular species of sphingomyelins have been reported, especially derived from nerve tissue, while the lower animal Artemia contains this unusual sphingomyelin perhaps because of having a much simpler nervous system. The purified unusual sphingomyelin derived from Artemia franciscana might be a very useful tool FRAX597 purchase in elucidating the functions

and mechanisms of action of this mediator.”
“Successful cryopreservation of Q. robur germplasm as plumules (i.e. shoot apical meristems of embryos) is described in this paper. After excision from the recalcitrant seeds and preliminary storage in 0.5 M sucrose solution (18 h), the plumules were subjected to cryoprotection (in 0.75 M sucrose, followed by 1.0 M sucrose and 1.5 M glycerol solutions), and next to desiccation (over silica gel or in nitrogen gas) and cooling (in slush at -210 degrees C or in vials filled with liquid nitrogen, LN, -196 degrees C), and were then cryostored for 24 h. High percentage of survival was obtained after cryostorage (21-67%, depending on pretreatment, assessed in vitro by greening plumules that increased in size). Desiccation of plumules over silica gel resulted in significantly higher survival after cryopreservation (58%) in comparison with desiccation in nitrogen gas (29%), with regrowth (shoots with leaves) 5-18%.