期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1977
卷号：74
期号：3
页码：818-821
DOI：10.1073/pnas.74.3.818
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Ribosomes prepared from chicken liver or rabbit reticulocytes bound concanavalin A in a molar ratio of approximately 1:1. This binding is to the large subunit of the eukaryote ribosomes with a dissociation constant of 5 X 10(-7) M (0 degrees). The binding of concanavalin A to Escherichia coli ribosomes was much less. Binding to the RNA or to possible membrane contaminants was ruled out in control experiments. Chicken liver ribosomes were labeled in vivo with 3H-labeled amino acids, purified, and dissociated in sodium dodecyl sulfate. Affinity chromatography of this preparation made it possible to isolate the small proportion of the ribosomal proteins (about 1.5%) containing the concanavalin A binding site. This protein moved as a single band during electrophoresis on polyacrylamide gels containing sodium dodecyl sulfate and showed an apparent molecular weight of 31,000.
