Definition

A type of protein that, when combined with a coenzyme, becomes part of an active enzyme that can catalyze reactions.

Example

The apoenzyme needs a coenzyme to become active and perform its function in the cell.

Conversation

Have you ever heard of an apoenzyme?

Yeah, I think it's the part of the enzyme that needs a coenzyme to work, right?

Exactly! Without the apoenzyme, the whole system can't function properly.

That's really interesting; I never knew how important it was for enzyme activity.

Synonyms & Antonyms

Root Explanation

Apoenzyme → It is formed from "apo-" (from Greek "apo", meaning away from or separate) and "enzyme" (from Greek "enzymon", meaning leaven or ferment). The word "apoenzyme" refers to the part of an enzyme that is inactive until it combines with a cofactor, thus being separate from its active form.

Memory Tip

Think of 'apo-' meaning 'away from' and 'enzyme' as a fermenting agent — an apoenzyme is an enzyme that is inactive until it is combined with something else.

Visually Confused Words