Table 2. Inhibition of Ciprofloxacin-Induced DNA Cleavage^a.

compound	Ec gyrase	Sa gyrase	Ec Topo IV
az4.9	-	-	+
kb6.4	-	-	+
kz6	+	+	+
kp5.8	ND	ND	-
nz5.6	+	+	+
np5.9	-	-	+

^aND: not determined; + indicates greater than 95% inhibition.