The MEME Suite

Nucleotide IUPAC Alphabet

Nucleotide Code:  Base:
----------------  -----
A.................Adenine
C.................Cytosine
G.................Guanine
T (or U)..........Thymine (or Uracil)
R.................A or G
Y.................C or T
S.................G or C
W.................A or T
K.................G or T
M.................A or C
B.................C or G or T
D.................A or G or T
H.................A or C or T
V.................A or C or G
N.................any base

Protein IUPAC Alphabet

Amino Acid Code:  Three letter Code:  Amino Acid:
----------------  ------------------  -----------
A.................Ala.................Alanine
B.................Asx.................Aspartic acid or Asparagine
C.................Cys.................Cysteine
D.................Asp.................Aspartic Acid
E.................Glu.................Glutamic Acid
F.................Phe.................Phenylalanine
G.................Gly.................Glycine
H.................His.................Histidine
I.................Ile.................Isoleucine
K.................Lys.................Lysine
L.................Leu.................Leucine
M.................Met.................Methionine
N.................Asn.................Asparagine
P.................Pro.................Proline
Q.................Gln.................Glutamine
R.................Arg.................Arginine
S.................Ser.................Serine
T.................Thr.................Threonine
V.................Val.................Valine
W.................Trp.................Tryptophan
X.................Xaa.................Any amino acid
Y.................Tyr.................Tyrosine
Z.................Glx.................Glutamine or Glutamic acid

MAST IUPAC Ambiguous Characters