Definition

A substance that is necessary for an enzyme to work properly, often a metal ion or a coenzyme, or a factor that helps another factor to produce a specific effect.

Example

Zinc is an important cofactor for many enzymes in the body.

Conversation

I was reading about enzymes and came across the term cofactor.

Oh really? What does that mean exactly?

It’s a substance that helps enzymes function properly, like a helper molecule.

Got it! That makes sense, enzymes need all the right support to work.

Synonyms & Antonyms

Root Explanation

Cofactor → It is formed from "co-" (meaning together) and "facere" (meaning to do or make). The word refers to a substance that works together with another to facilitate a process, particularly in biological contexts.

Memory Tip

Think of 'working together' ('co-') to 'make' something happen ('facere') — that's why a cofactor is something that helps in a process.

Visually Confused Words