IUPAC code table


Amino acid codes

1-letter3-letterdescription
AAlaAlanine
RArgArginine
NAsnAsparagine
DAspAspartic acid
CCysCysteine
QGlnGlutamine
EGluGlutamic acid
GGlyGlycine
HHisHistidine
IIleIsoleucine
LLeuLeucine
KLysLysine
MMetMethionine
FPhePhenylalanine
PProProline
SSerSerine
TThrThreonine
WTrpTryptophan
YTyrTyrosine
VValValine
BAsxAspartic acid or Asparagine
ZGlxGlutamine or Glutamic acid
XXaaAny amino acid


Nucleic acid codes

codedescription
AAdenine
CCytosine
GGuanine
TThymine
UUracil
RPurine (A or G)
YPyrimidine (C, T, or U)
MC or A
KT, U, or G
WT, U, or A
SC or G
BC, T, U, or G (not A)
DA, T, U, or G (not C)
HA, T, U, or C (not G)
VA, C, or G (not T, not U)
NAny base (A, C, G, T, or U)


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