Amino Acid Properties

Alanine

uncharged and polar

Cysteine

uncharged but polar, can make disulfide bonds

Aspartate

negatively charged

Glutamate

negatively charged, can be carboxylated

Phenylalanine

uncharged and nonpolar

Glycine

uncharged and nonpolar, no chiral center

Histidine

positively charged, can be methylated and acetylated

Isoleucine

uncharged and nonpolar, contains a chiral center

Lysine

uncharged and nonpolar, can be methylated and acetylated

Leucine

uncharged and nonpolar

Methionine

uncharged and nonpolar

Asparaginine

uncharged and nonpolar, can be N-glycosylated

Proline

uncharged and nonpolar, can build collagen, can be hydroxylated

Glutamine

ranging pKa, uncharged and nonpolar

Arginine

uncharged and nonpolar

Serine

uncharged but polar, can be phosphorylated, can be O-glycosylated

Threonine

uncharged but polar, has a chiral center, can be phosphorylated, can be O-glycosylated

Valine

uncharged and nonpolar

Tryptophan

ranging pKa, aromatic

Tyrosine

uncharged but polar, can be phosphorylated