2,3-diaminopropionic acid
2,3-dihydroxybenzoic acid
2,4-diaminobutyric acid
2-aminoadipic acid
2-aminoisobutyric acid
3,5-dihydroxyphenylglycine
4-hydroxyphenylglycine
4R-hydroxyproline
D-alanine
N5-acetyl-N5-hydroxyornithine
N5-formyl-N5-hydroxyornithine
N5-hydroxyornithine
R-beta-hydroxytyrosine
alanine
anthranilic acid
arginine
asparagine
aspartic acid
benzoic acid
beta-alanine
cysteine
glutamic acid
glutamine
glycine
histidine
homoserine
isoleucine
leucine
lysine
ornithine
phenylalanine
pipecolic acid
proline
serine
threonine
tryptophan
tyrosine
valine
