Amino Acid Classes

With three- and one-letter abbreviations

Glycine (Gly-G)

Glycine (Gly-G)

Hydrophobic aliphatic

Alanine (Ala-A)

Hydrophobic aliphatic

Valine (Val-V)

Hydrophobic aliphatic

Leucine (Leu-L)

Hydrophobic aliphatic

Isoleucine (Ile-I)

Hydrophobic aliphatic

Methionine (Met-M)

Hydrophobic aliphatic

Phenylalanine (Phe-F)

Hydrophobic aromatic

Tyrosine (Tyr-Y)

Hydrophobic aromatic

Tryptophan (Trp-W)

Hydrophobic aromatic

Aspartic acid (Asp-D)

Hydrophilic acidic

Glutamic acid (Glu-E)

Hydrophilic acidic

Lysine (Lys-K)

Hydrophilic basic

Arginine (Arg-R)

Hydrophilic basic

Histidine (His-H)

Hydrophilic basic

Asparagine (Asn-N)

Hydrophilic amide acidic

Glutamine (Gln-Q)

Hydrophilic amide acidic

Serine (Ser-S)

Hydrophilic hydroxylated acidic

Threonine (Thr-T)

Hydrophilic hydroxylated acidic

Cysteine (Cys-C)

Unique: thiol (-SH) side chain to make disulfide bonds

Proline (Pro-P)

Unique: has imine group, not amine group to create kink