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Title: Purification of the messenger ribonucleic acid for the lipoprotein of the Escherichia coli outer membrane. Author: Wang SS, Pirtle R, Pirtle I, Small M, Inouye M. Journal: Biochemistry; 1979 Oct 02; 18(20):4270-7. PubMed ID: 114211. Abstract: The mRNA for the lipoprotein of the Escherichia coli outer membrane has been purified to 85% homogeneity. The purification procedure involved phenol extraction, NaCl extraction, gel filtration on Sephadex G-100 and Sephadex G-200, and reversed-phase column chromatography on RPC-5. The purity of the final product was estimated to be 85% by analysis of the ribonuclease T1 fingerprint of the mRNA. The purified mRNA was able to direct the synthesis of cross-reactive material with antilipoprotein serum in both the E. coli and the wheat germ cell-free protein-synthesizing systems. The size of the mRNA was determined to be 8.2 S from its mobility in polyacrylamide--agrose gels. During the purification, two other RNA species, similar in size to the lipoprotein mRNA, were also isolated. Their sizes were determined to be 8.7 and 9.1 S. They both were inactive in an E. coli cell-free protein-synthesizing system.[Abstract] [Full Text] [Related] [New Search]