Tryptophan Synthase: Structure and Function of the Monovalent Cation Site
نویسندگان
چکیده
منابع مشابه
the underlying structure of language proficiency and the proficiency level
هدف از انجام این تخقیق بررسی رابطه احتمالی بین سطح مهارت زبان خارجی (foreign language proficiency) و ساختار مهارت زبان خارجی بود. تعداد 314 زبان آموز مونث و مذکر که عمدتا دانشجویان رشته های زبان انگلیسی در سطوح کارشناسی و کارشناسی ارشد بودند در این تحقیق شرکت کردند. از لحاظ سطح مهارت زبان خارجی شرکت کنندگان بسیار با هم متفاوت بودند، (75 نفر سطح پیشرفته، 113 نفر سطح متوسط، 126 سطح مقدماتی). کلا ...
15 صفحه اولStructure and Function of the Tryptophan Synthase a2b2 Complex
To probe the structural and functional roles of activesite residues in the tryptophan synthase a2b2 complex from Salmonella typhimurium, we have determined the effects of mutation of His in the b subunit. His is located adjacent to b subunit Lys, which forms an internal aldimine with the pyridoxal phosphate and catalyzes the abstraction of the a-proton of L-serine. The replacement of His by leu...
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Single channel patch-clamp techniques were used to study nicotinic acetylcholine receptors in cultured rat myotubes. The single channel conductance in pure cesium and sodium levels off at high concentrations, as if a binding site within the channel were saturating . The conductances at very low concentrations, however, are larger than predicted by the simplest one-site transport model fitted to...
متن کاملThe Subunit Structure of Tryptophan Synthase from Neurospora crassa*
Tryptophan synthase of Neurospora crassa was purified to electrophoretic homogeneity from the wild type strain 74A which had been derepressed by the presence of 0.5 rnr,r indoleacrylic acid in the growth medium. The isolated material migrated as a single symmetrical peak in the ultracentrifuge with a sedimentation constant of 6.0 S. Gel filtration on Sephadex G-ZOO and conventional sedimentatio...
متن کاملThe subunit structure of tryptophan synthase from Neurospora crassa.
Tryptophan synthase of Neurospora crassa was purified to electrophoretic homogeneity from the wild type strain 74A which had been derepressed by the presence of 0.5 mM indoleacrylic acid in the growth medium. The isolated material migrated as a single symmetrical peak in the ultracentrifuge with a sedimentation constant of 6.0 S. Gel filtration on Sephadex G-200 AND CONVENTIONAL SEDIMENTATION E...
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ژورنال
عنوان ژورنال: Biochemistry
سال: 2009
ISSN: 0006-2960,1520-4995
DOI: 10.1021/bi9008374