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J Bacteriol. 1978 January; 133(1): 437-438

Position of the mutation in beta-galactosidase ochre mutant U118.

I Zabin, A V Fowler and J R Beckwith

ABSTRACT

The Escherichia coli lacZ ochre mutant strain U118 was converted to an amber mutant and suppressed with supF, which inserts tyrosine. Enzymatically active beta-galactosidase was isolated. It contained tyrosine at residue number 17 instead of glutamic acid as in wild type.

J Bacteriol. 1978 January; 133(1): 437-438






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