Ahmad F, Ahmad PM, Mendez A. Rat liver pyruvate carboxylase. Purification, detection and quantification of apo and holo forms by immuno-blotting and by an enzyme-linked immunosorbent assay.
Biochem J 1986;
236:527-33. [PMID:
3753465 PMCID:
PMC1146872 DOI:
10.1042/bj2360527]
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Abstract
A simple scheme for the purification of pyruvate carboxylase from rat liver mitochondria is described. It is rapid and provides high-purity pyruvate carboxylase with excellent yield and reproducibility. The final enzyme preparations appear to be homogeneous by the following criteria: elution behaviour on molecular-sizing matrix, SDS/polyacrylamide-gel electrophoresis, Ouchterlony double-diffusion analysis and Western blotting. Detection and quantification of nanogram amounts of pyruvate carboxylase (apo and holo forms) in total tissue homogenates by immuno-blotting and by enzyme-linked immunosorbent assay are described. The data provided suggest that under normal physiological conditions (both in vivo and in vitro) essentially all the pyruvate carboxylase molecules are biotinylated.
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