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1. mRNA was extracted from the livers of starved rats and incubated in a heterologous cell-free protein-synthesizing system derived from rabbit reticulocytes. The presence of newly synthesized phosphoenolpyruvate carboxykinase (GTP) was detected by immunoprecipitation with a specific antibody to the enzyme and analysis by sodium dodecyl sulphate/polyacrylamide-gel electrophoresis. 2. The synthesis of the enzyme was dependent on the addition of rat liver RNA, whereas RNA isolated from rat spleen was inactive. If ovalbumin and anti-ovalbumin were used to form the immunoprecipitates, no radioactivity that migrated as phosphoenolpyruvate carboxykinase was detected. 3. The optimal concentrations of magnesium acetate and KCl for phosphoenolpyruvate carboxykinase synthesis were determined. 4. When polyribosomal RNA was separated by sucrose-gradient centrifugation, phosphoenolpyruvate carboxykinase mRNA migrated between 20 and 26 S in keeping with the high mol. wt. of the protein (85 000). 5. The presence of poly(A) in phosphoenolpyruvate carboxykinase mRNA was suggested by retention of mRNA activity on oligo(dT)-cellulose columns. 6. It was concluded that the cell-free synthesis of phosphoenolpyruvate carboxykinase can serve as a bioassay for intracellular phosphoenolpyruvate carboxykinase mRNA.
S M Tilghman, and
L M Fisher, and
L Reshef, and
F J Ballard, and
R W Hanson
June 1974,
The Biochemical journal,
S M Tilghman, and
L M Fisher, and
L Reshef, and
F J Ballard, and
R W Hanson
December 1976,
Biochemistry,
S M Tilghman, and
L M Fisher, and
L Reshef, and
F J Ballard, and
R W Hanson
November 1974,
The Biochemical journal,
S M Tilghman, and
L M Fisher, and
L Reshef, and
F J Ballard, and
R W Hanson
August 1975,
The Biochemical journal,
S M Tilghman, and
L M Fisher, and
L Reshef, and
F J Ballard, and
R W Hanson
July 1977,
European journal of biochemistry,
S M Tilghman, and
L M Fisher, and
L Reshef, and
F J Ballard, and
R W Hanson
January 1992,
Bioconjugate chemistry,
S M Tilghman, and
L M Fisher, and
L Reshef, and
F J Ballard, and
R W Hanson
December 1978,
The Biochemical journal,
S M Tilghman, and
L M Fisher, and
L Reshef, and
F J Ballard, and
R W Hanson
March 1975,
The Biochemical journal,
S M Tilghman, and
L M Fisher, and
L Reshef, and
F J Ballard, and
R W Hanson
January 1980,
Biochemistry,
S M Tilghman, and
L M Fisher, and
L Reshef, and
F J Ballard, and
R W Hanson
September 1978,
European journal of biochemistry,
