title: Polypeptides synthesized in vitro by poly(A)+ and poly(A)- mRNAs of rat ascites hepatoma AH 7974 cells.
abstract: Polysomal RNA of rat ascites hepatoma AH 7974 cells was fractionated into poly(A)+ and poly(A)- mRNAs and these RNAs were translated into polypeptides in a protein-synthesizing system derived from wheat germ. The analysis of polypeptides synthesized in vitro by two-dimensional gel electrophoresis revealed that there are three classes of polypeptides. The first group can be synthesized equally by both poly(A)+ and poly(A)- mRNAs; the second and third groups are synthesized predominantly by poly(A)+ and poly(A)- mRNAs, respectively. These results suggest that the three classes of polypeptides can be characterized by the presence or absence of poly(A) tails of the corresponding mRNAs.
mesh_terms: D000818:Animals; D007700:Kinetics; D008114:Liver Neoplasms, Experimental / Q000378:metabolism*; D008970:Molecular Weight; D010452:Peptide Biosynthesis; D010944:Plants / Q000378:metabolism; D011061:Poly A / Q000378:metabolism*; D014176:Protein Biosynthesis; D012333:RNA, Messenger / Q000378:metabolism*; D012335:RNA, Ribosomal / Q000378:metabolism; D051381:Rats; D014908:Triticum / Q000378:metabolism
chemical_list: D012333:RNA, Messenger; D012335:RNA, Ribosomal; D011061:Poly A