carboxyl functional group

---

The carboxyl functional group is an acidic functional group frequently found in biological molecules.

• It is found in amino acids, proteins. fatty acids, acetic acids and other organic acids.

Because the carboxyl functional group is a weak acid it will dissociate.

At a pH of 7 the carboxyl group is in the dissociated form (COO-).
The carboxyl group of an amino acid will contribute a negative charge at neutral pH