1887

Abstract

Summary: A new type of haem-deficient mutant was isolated in K12 by neomycin selection. The mutant was deficient in uroporphyrinogen III cosynthase activity as indicated by the accumulation of uroporphyrin I and coproporphyrin I. The mapping of the corresponding gene by P1-mediated transduction showed that the new gene was located between and , at min 83 on the chromosomal map of K12.

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1979-01-01
2021-05-10
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