Abstract
Hepatocytes, isolated from rats fed a low-protein diet, were incubated with [32P]Pi and the phosphoproteins analysed. Immunoprecipitation using antibody against El of branched-chain 2-oxo acid dehydrogenase complex demonstrated phosphorylation of the alpha-subunit of El. Analysis of the tryptic phosphopeptides from the alpha-subunit indicated that two sites were phosphorylated. 4-methyl 2-oxopentanoate and DL-2-chloro 4-methylpentanoate decreased labelling of both sites. No major direct effects of several hormones on phosphorylation of branched-chain 2-oxo acid dehydrogenase was observed.
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Schedule a callMore From: Biochemical and biophysical research communications
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