Glycine
Alanine
Valine
Leucine
Isoleucine
Phenylalanine
proline
Methionine
Tryptophan
Cysteine
Serine
Threonine
Tyrosine
glutamine
Asparagine
Proline side chains
Imino group
Cysteine and methionine
Contains sulfur
Histidine
Imidazole ring
Arginine
Guanidino group
Alanine, valine, leucine, isoleucine, lysine
Aliphatic side chains