Fig. 1. ct189 and ct190 encode functional DNA gyrase subunits.
A. SDS PAGE of purified DNA gyrase subunits: CT189 (GyrA) and CT190 (GyrB) stained with Coomassie brilliant blue. The size of protein markers (M) in kDa is indicated to the left.
B. CT189 (GyrA) and CT190 (GyrB) proteins reconstitute an ATP-dependent supercoiling activity. Relaxed plasmid was incubated with CT189 (100 ng) and/or CT190 (50 ng) in the presence or absence of 2 mM ATP.