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These abbreviations for nucleic acids and amino acids can be used
when searching most molecular databases.
Amino Acids
| Amino Acid |
Designations |
|
3 letter |
1 1etter |
| 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 |
| any amino acid |
|
Z |
Nucleic Acids (DNA and RNA)
| IUB |
Meaning |
| A |
Adenosine |
| C |
Cytidine |
| G |
Guanine |
| T |
Thymidine |
| U |
Uridine |
| R |
G or A (either purine) |
| Y |
A or T (either pyrimidine) |
| K |
G or T (Keto) |
| M |
A or C (Amino) |
| S |
G or C (Strong) |
| W |
A or T (Weak) |
| B |
C G or T |
| D |
A G or T |
| H |
A C or T |
| V |
A C or G |
| N |
A C G or T (any nucleotide) |
| Author: |
Andrew Louka |
| Modified by: |
William Barnes
Clarion University of Pennsylvania |
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