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Biochem Biophys Res Commun ; 156(2): 733-9, 1988 Oct 31.
Article in English | MEDLINE | ID: mdl-3056402

ABSTRACT

Interleukin-2 produced from a recombinant E. coli was found to contain as much as 19% norleucine in place of methionine in a minimal medium fermentation. Medium supplementation experiments and use of a leucine-requiring mutant host strain indicated the origin of norleucine to be de novo biosynthesis by reactions involving the enzymes of the leucine biosynthetic pathway. The misincorporation was highly suppressed by addition of either L-leucine or L-methionine to the fermentation and completely suppressed by adding both amino acids.


Subject(s)
Aminocaproates/metabolism , Escherichia coli/metabolism , Interleukin-2/biosynthesis , Norleucine/metabolism , Recombinant Proteins/biosynthesis , Cyanogen Bromide , Escherichia coli/drug effects , Feedback , Fermentation , Interferon Type I/metabolism , Leucine/metabolism , Leucine/pharmacology , Methionine/metabolism , Methionine/pharmacology , Mutation , Norleucine/biosynthesis
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