“Position Effect” on Dominance in the d -Serine Deaminase System of Escherichia coli K-12
- 1 December 1967
- journal article
- research article
- Published by American Society for Microbiology in Journal of Bacteriology
- Vol. 94 (6) , 1989-+
- https://doi.org/10.1128/jb.94.6.1989-1993.1967
Abstract
A completely stable F32 merodiploid was isolated, which has the dsd genotype dsdA+ dsdCx3/F-dsdA+ dsdC+. The stabilization apparently does not result from an alteration in the F, or from its integration in the chromosome, but rather from a chromosomal aberration. The stable strain can exist in 2 forms, which interconvert at low frequency. In one form, the episomal dsd markers are in normal apposition with the chromosomal markers, and in this case cis dominance of dsdCx3 is incomplete. In the other form, the 2 regions are not in normal apposition, and dsdCx3 is completely cis dominant. A model to explain these findings is presented.This publication has 10 references indexed in Scilit:
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