| Literature DB >> 6346486 |
Abstract
Nucleotide sequences of translated regions of the trp operon in 12 wild strains of Escherichia coli reveal striking uniformity among eight strains (suggesting recent common ancestry and supporting the importance of periodic selection in natural populations) and clustered substitutions in four strains (implicating events affecting runs of nucleotides).Entities:
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Year: 1983 PMID: 6346486 DOI: 10.1126/science.6346486
Source DB: PubMed Journal: Science ISSN: 0036-8075 Impact factor: 47.728