20 Standard Amino Acids

Glycine (Gly/G)

Nonpolar, aliphatic R Groups

Alanine (Ala/A)

Nonpolar, aliphatic R Groups

Proline (Pro/P)

Nonpolar, aliphatic R Groups

Valine (Val/V)

Nonpolar, aliphatic R Groups

Leucine (Leu/L)

Nonpolar, aliphatic R Groups

Isoleucine (Ile/I)

Nonpolar, aliphatic R Groups

Methionine (Met/M)

Nonpolar, aliphatic R Groups

Phenylalanine (Phe/F)

Aromatic R groups

Tyrosine (Tyr/Y)

Aromatic R groups

Tryptophan (Trp/W)

Aromatic R groups

Serine (Ser/S)

Polar, uncharged R groups

Threonine (Thr/T)

Polar, uncharged R groups

Cysteine (Cys/C)

Polar, uncharged R groups

Asparagine (Asn/N)

Polar, uncharged R groups

Glutamine (Gln/Q)

Polar, uncharged R groups

Lysine (Lys/K)

Positively charged R groups

Arginine (Arg/R)

Positively charged R groups

Histidine (His/H)

Positively charged R groups

Aspartate (Asp/D)

Negatively charged R groups

Glutamate (Glu/E)

Negatively charged R groups