Download PDF by Alton Meister: Advances in Enzymology and Related Areas of Molecular

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By Alton Meister

ISBN-10: 0470122978

ISBN-13: 9780470122976

ISBN-10: 0471081205

ISBN-13: 9780471081203

Advances in Enzymology and similar parts of Molecular Biology is a seminal sequence within the box of biochemistry, providing researchers entry to authoritative experiences of the newest discoveries in all components of enzymology and molecular biology. those landmark volumes date again to 1941, offering an unequalled view of the old improvement of enzymology. The sequence deals researchers the newest knowing of enzymes, their mechanisms, reactions and evolution, roles in complicated organic procedure, and their software in either the laboratory and undefined. every one quantity within the sequence positive aspects contributions via major pioneers and investigators within the box from around the globe. All articles are conscientiously edited to make sure thoroughness, caliber, and clarity.

With its wide selection of subject matters and lengthy ancient pedigree, Advances in Enzymology and similar components of Molecular Biology can be utilized not just via scholars and researchers in molecular biology, biochemistry, and enzymology, but in addition by means of any scientist drawn to the invention of an enzyme, its houses, and its applications.

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Additional info for Advances in Enzymology and Related Areas of Molecular Biology, Volume 52

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4% yield, with a specific activity of 45 pmole product formed per minute per mg of enzyme. The purified enzyme consisted of several distinct forms with approximately equal specific activities. The different enzyme forms could be resolved partially either by gel filtration chromatography of by gel electrophoresis under non-denaturing conditions. The largest of these had a molecular weight of 160,000 estimated by sodium dodecyl sulfatepolyacrylamide gel electrophoresis after reduction with 0-mercaptoethanol (34).

This enzyme preparation synthesized both the 6’ and 3’ isomers of sialyllactose, although it could not be established whether both isomers were produced by a single enzyme or by separate enzymes. However, the relative quantities of 3’- and 6’sialyllactose produced by extracts from rat liver varied with the age of the animal and as a function of pH and thus were suggested to be the products of separate enzymes (45). Sialyltransferase activities in liver extracts were also found to utilize glycoprotein acceptors that contained the terminal Galpl+4GlcNAc sequence of complex asparagine-linked oligosaccharides (23,45).

Gal/31+ 4(6)GlcNAc, Gal/31+6GalNAc, Galpl+4Glc) reduces V,, by 15-to 80-fold. With larger oligosaccharides and glycoprotein acceptors, the specificity of GLYCOSY LTRANSFERASES 41 this enzyme was much more strict. The kinetic parameters determined for lacto-N-tetraose are similar to those reported for the corresponding disaccharide, Galpl+3GlcNAc. However, despite the acceptor activity of Nacteyllactosamine (Ga@1+4GlcNAc), lacto-N-neotetraose was not an acceptor at all under conditions sufficient to completely substitute the isomeric lacto-N-tetraose.

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Advances in Enzymology and Related Areas of Molecular Biology, Volume 52 by Alton Meister

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