It employs one cofactor, copper.

It employs one cofactor, calcium.

It employs one cofactor, NADP+ in a direct oxidation mechanism.

It employs one cofactor, H+.

This enzyme employs one cofactor, iron.

The oxygen incorporated need not be derived from O. It employs one cofactor, iron.

It employs one cofactor which may be either heme or vanadia.

It employs one cofactor, neutral salt.

It employs one additional cofactor, iron.

It employs one cofactor, metal.