نتایج جستجو برای: pyridoxal 5
تعداد نتایج: 1216994 فیلتر نتایج به سال:
Lysine 5,6-aminomutase is an adenosylcobalamin and pyridoxal-5'-phosphate-dependent enzyme that catalyzes a 1,2 rearrangement of the terminal amino group of dl-lysine and of l-beta-lysine. We have solved the x-ray structure of a substrate-free form of lysine-5,6-aminomutase from Clostridium sticklandii. In this structure, a Rossmann domain covalently binds pyridoxal-5'-phosphate by means of lys...
The inducible arginine decarboxylase of Escherichia coli, a pyridoxal-P enzyme, has been purified to a specific activity of 410 pmoles of COz per min per mg. It can be crystallized from ammonium sulfate solutions without increase in specific activity, sediments as a single species in the analytical ultracentrifuge, and shows only slight impurities on acrylamide gel electrophoresis. Its preferre...
The present communication considers some findings which appear to implicate chelation in the amino acid concentration process. The inquiry grows out of the finding that pyridoxal stimulates concentration of amino acids by Ehrlich ascites tumor cells, and that cells from vitamin Be-deficient mice show a deficient concentrating ability (4, 5). Metal chelation is known to be involved in the cataly...
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