Amino Acids and their Abbreviations

The famous 20

 

name	three letter code	one letter code	structure
alanine	Ala	A
arginine	Arg	R
asparagine	Asn	N
aspartic acid	Asp	D
cysteine	Cys	C
glutamic acid	Glu	E
glutamine	Gln	Q
glycine	Gly	G
histidine	His	H
isoleucine	Ile	I
leucine	Leu	L
lysine	Lys	K
methionine	Met	M
phenylalanine	Phe	F
proline	Pro	P
serine	Ser	S
threonine	Thr	T
tryptophan	Trp	W
tyrosine	Tyr	Y
valine	Val	V

 

And some less famous relatives

 

name	three letter code	one letter code	structure
selenocysteine	Sec	U
pyrrolysine	Pyl	O
homocysteine	Hcy