Cofactor

Cofactor may refer to any of the following:


 * Cofactor (biochemistry) is a substance that needs to be present in addition to an enzyme for a certain reaction to take place.


 * Cofactor (epidemiology) is a condition that exacerbates the effects of another condition; for instance, while chlamydia infection on its own will not cause cervical cancer, it increases the risk that HPV infection will do so.