Besides the lac operon, which other operons are subject to catabolite repression?

Catabolite repression is a regulatory mechanism in bacteria where the presence of a preferred energy source (usually glucose) inhibits the use of other energy sources. Besides the lac operon, other operons that are subject to catabolite repression include:

1. The ara operon: This operon is responsible for the metabolism of arabinose when glucose is not available. When glucose is present, the ara operon is repressed.

2. The gal operon: This operon is responsible for the metabolism of galactose. It is also subject to catabolite repression in the presence of glucose.

3. The maltose operon: This operon is responsible for the metabolism of maltose. It is repressed in the presence of glucose.

4. The rhamnose operon: This operon is responsible for the metabolism of rhamnose. It is also subject to catabolite repression when glucose is present.

5. The melibiose operon: This operon is responsible for the metabolism of melibiose. It is repressed in the presence of glucose.

These are just a few examples. Many other operons in bacteria are also subject to catabolite repression. The exact mechanisms of catabolite repression can vary between different operons and bacterial species.