amino acids (20)

Arginine

Arg, R, charged hydrophillic (+)

Histidine

His, H, charged hydrophillic (+)

Lysine

Lys, K, charged hydrophillic (+)

Aspartic Acid

Asp, D, charged hydrophillic (-)

Glutamic Acid

Glu, E, charged hydrophillic (-)

Serine

Ser, S, polar hydrophillic uncharged

Threonine

Thr, T, polar hydrophillic uncharged

Asparagine

Asn, N, polar hydrophillic uncharged

Glutamine

Gln, Q, polar hydrophillic uncharged

Tyrosine

Tyr, Y, polar hydrophillic uncharged

Alanine

Ala, A, nonpolar hydrophobic

Isoleucine

Ile, I, nonpolar hydrophobic

Leucine

Leu, L, nonpolar hydrophobic

Methionine

Met, M, nonpolar hydrophobic

Phenylalanine

Phe, F, nonpolar hydrophobic

Tryptophan

Trp, W, nonpolar hydrophobic

Valine

Val, V, nonpolar hydrophobic

Cysteine

Cys, C, forms disulfate bridge/bond with other Cys

Glycine

Gly, G, smallest, allows protein to be more flexible

Proline

Pro, P, lacking a H in amino group, amino group covalently bonded to hydrocarbon chain which creates a ring structure; rotating and H bonding is limited