Просмотр исходного текста страницы Method-Production-Protease-Chitinase-Biofertilizers-Pombe-Oligosaccharides-s

Schizosaccharomyces pombe whole-cell glycoproteins, previously depleted of N-linked glycans by sequential treatment with endo-ss-N-acetylglucosaminidase H and peptide-N4-asparagine amidohydrolase F, were ss-eliminated with M NaOH1 M NaBH4 to release the O-linked oligosaccharides. The saccharide-alditols were separated by gel-exclusion chromatography into pools from Hexitol to Hex4Hexitol in size. Analysis of the Hexitol pool indicated Man to be the only sugar linked to Ser or Thr residues. The Hex1Hexitol pool contained two components, Galalpha1,2Man-ol (2A) and Manalpha1, 2Man-ol (2B). The Hex2Hexitol pool contained two components, Galalpha1,2Manalpha1,2Man-ol (3A) and Manalpha1,2Manalpha1,2Man-ol (3B). The two Hex3Hexitol components were Galalpha1,2(Galalpha1, 3)Manalpha1,2Man-ol (4A) and Manalpha1,2(Galalpha1,3)Manalpha1, 2Man-ol (4B).<br /><br /> The Hex4Hexitol component was found to be a single isomer with the composition of Galalpha1,2(Galalpha1,3)Manalpha1, 2Manalpha1,2Man-ol (5AB). Surprisingly, galactobiose was not detected in any of these oligosaccharides. The gma12 (T. G. Chappell and G. Warren (1989) J. Cell Biol.<br /><br />, 9, 2693-27) and gth1 (T. G. [https://bbs.pku.edu.cn/v2/jump-to.php?url=https://en.wikipedia.org/wiki/Lacto-N-tetraose Fucosylated Lactose] ) alpha1, 2-galactosyltransferase-deficient mutants and the gma12gth1 double mutant S.pombe strains were similarly examined. The results indicated that gma12p is solely responsible for the addition of terminal alpha1,2-linked Gal in compound 2A, while one or both of gma12p and gth1p are required for the alpha1,2-linked Gal in 4A. Both transferases are largely responsible for terminal Gal in isomer 5AB. [https://ioby.org/users/walshtvxflanagan787536 Get it now] gma12 nor gth1 had any discernible effect on the structure of the large N-linked galactomannans as determined by 1H NMR spectroscopy.<br /><br /> Thus, while gth1p and gma12p appear responsible for adding alpha1,2-linked Gal to terminal Man, neither adds galactose side chains to the N-linked poly alpha1,6-Man outerchain, nor the O-linked branch-forming alpha1,3-linked Gal. Furthermore, the presence of Hexalpha1,2(Galalpha1,3)Manalpha1,2- structures in the O-linked glycans implies the presence of a novel branch-forming alpha1,3-galactosyltransferase in Assignment of acetyl groups to O-2 andor O-3 of pectic oligogalacturonides using negative electrospray ionization ion trap mass spectrometry.Polysaccharides, leurs Organisations et Interactions, rue de la Géraudière, BP Partially acetylated and methylated oligogalacturonides produced by enzymatic hydrolysis of sugar beet pectin were analysed by negative electrospray ionization ion trap mass spectrometry (ESI-ITMS). The (18)O labelling of the oligomer reducing end allowed the precise assignment of the fragments resulting from glycosidic bond and cross-ring cleavages. The collisional-induced dissociation of the C(i) and Z(j) fragment ions through sequential MS(n) experiments always displayed , 2)A-type cross-ring cleavage ions which were related to C(2)H(4)O(2) losses. These , 2)A ions appeared to be highly diagnostic ions allowing the precise location of the acetyl groups to the O-2 andor O-3 of the acetylated galacturonic acid residues.Profiling of isovalertatin family aminooligosaccharides extracted from the culture of Streptomyces luteogriseus by using liquid chromatographyelectrospray A rapid and novel procedure using the liquid chromatography coupled to an electrospray ionization ion trap mass spectrometry technique was applied for the profiling of isovalertatin-family aminooligosaccharides in the extract from the culture filtrate of Streptomyces luteogriseus.<br /><br /> The aminooligosaccharides were separated on a C-8 reversed-phase column with an acetonitrile-alkaline water gradient. The desired homologues were detected using the multiple reaction monitoring mode, and the chemical structures were confirmed by analyzing the characteristic fragment ions in their collision-induced dissociation spectra. This facile procedure led to the identification of all the five known aminooligosaccharides, isovalertatins 3, M13, M23, 3, and D23, in addition to the characterization of at least 41 novel isovalertatins, the molecular weights of which ranged from 729 to 2,793. This kind of assay should be intended as a simple and convenient way for the high-throughput analysis of screening aminooligosaccharides and potentially other structural families of natural Quantification of orally administered chondroitin sulfate oligosaccharides in 4-jo, Teine, Sapporo, Hokkaido,064, 42-1- Nishi-Miyanosawa, Teine, Chondroitin sulfate has been widely administered orally to improve knee osteoarthritis.