Abstract
7-9S RNA has been isolated from polyribosomes of HeLa S-3 cells in S phase. These RNA species direct the synthesis in vitro of all five classes of human histones when they are added to a protein-synthesizing system derived from mouse ascites tumor cells. The histones synthesized in vitro have been identified by two kinds of acrylamide gel electrophoresis, and by paper electrophoresis of tryptic digests. By use of the ratio of tyrosine to tryptophan incorporation as an index of contamination, it was determined that less than 10% of the 7-9S RNA is translated into proteins other than histones.
MeSH Terms
Amino Acids/metabolism
Animals
Carbon Isotopes
Cell Fractionation
Cell-Free System
Electrophoresis, Disc
Electrophoresis, Paper
HeLa Cells/analysis
Histones/analysis,biosynthesis
Humans
Lysine/metabolism
Methods
Mice
Neoplasms, Experimental/metabolism
Phenylalanine/metabolism
RNA, Messenger/isolation & purification,metabolism
RNA, Neoplasm/metabolism
Tritium
Trypsin
Tryptophan/metabolism
Tyrosine/metabolism
Chemicals
Amino Acids
Carbon Isotopes
Histones
RNA, Messenger
RNA, Neoplasm
Tritium
Tyrosine
Phenylalanine
Tryptophan
Trypsin
Lysine
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Jacobs-Lorena M
Baglioni C
Borun T W
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