Skip to content
Skip to main content

About this free course

Download this course

Share this free course

Addiction and neural ageing
Addiction and neural ageing

Start this free course now. Just create an account and sign in. Enrol and complete the course for a free statement of participation or digital badge if available.

amino acid

Building block of polypeptides and proteins, so named because of the presence of the amino, –NH2, and carboxylic acid, –COOH, groups of atoms in their structure. There are 20 common naturally occurring amino acids.

» Glossary