The lac operon is an inducible operon, whereas the trp operon is a repressible operon.

乳糖操诱导的操；色氨酸操阻遏的操。

The best studied inducible and repressible enzyme in phytopathogenic prokaryotes is endo-pectate lyase in E. carotovora.

植物病原原核生物得最清楚的胡萝卜软腐菌的果胶酸内裂解酶。