Citrate synthase of Escherichia coli

Abstract
Guest [J. Gen. Microbiol. (1981) 124, 17–23] has cloned the citrate synthase gene from E. coli into ColE1 plasmids. This plasmid‐coded enzyme has now been purified and characterised and shown to be indistinguishable from the chromosome‐coded enzyme in molecular, catalytic and regulatory properties. The plasmid copy number has been raised to > 200/cell by treatment with chloramphenicol and the effects of this increase on the intracellular level of citrate synthase have been investigated.