Made up of chains of amino acids; classified by number of
amino acids in a chain
• Peptides: fewer than 50 amino acids
- Dipeptides: 2 amino acids
- Tripeptides: 3 amino acids
- Polypeptides: more than 10 amino acids
• Proteins: more than 50 amino acids
- Typically 100 to 10,000 amino acids linked together
Ø Chains are synthesizes based on specific bodily DNA
Ø Amino acids are composed of carbon, hydrogen, oxygen,
and nitrogen