Hydrophobic
Alanine (Ala, A)
Valine (Val, V)
- Beta branching; branch at the beta carbon
Leucine (Leu, L)
Isoleucine (Ile, I)
- Beta branching
- Isomer of leucine (same formula, different arrangement of atoms)
Methionine (Met, M)
Phenylalanine (Phe, F) ---- aromatic
- Simplest of aromatic AA
- Benzene ring at beta carbon
Tryptophan (Trp, W) ---- aromatic