期刊
JOURNAL OF CHROMATOGRAPHY A
卷 917, 期 1-2, 页码 135-145出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0021-9673(01)00692-6
关键词
Porphyridium cruentum; phycoerythrins; biliproteins; proteins
A fast preparative two-step chromatographic method for purification of B-phycoerythrin from Porphyridium cruentum is described. This biliprotein was homogeneous as determined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis yielding three closely migrating bands corresponding to its three subunits. Baseline separation of its alpha-, beta- and gamma -subunits was achieved by a reversed-phase HPLC gradient semipreparative method with a C, large-pore column and a solvent system consisting of 0.05% trifluoroacetic acid (TFA) in water and 0.05% TFA in acetonitrile. B-Phycoerythrin in different aggregation states and its subunits have been spectroscopically characterized. Hexameric B-phycoerythrin has similar secondary and tertiary structure than dissociated B-phycoerythrin determined by circular dichroism. (C) 2001 Elsevier Science B.V. All rights reserved.
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