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  • Title: Position of the mutation in beta-galactosidase ochre mutant U118.
    Author: Zabin I, Fowler AV, Beckwith JR.
    Journal: J Bacteriol; 1978 Jan; 133(1):437-8. PubMed ID: 412841.
    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.
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