Nucleotide And Amino Acid Symbols
This page lists valid symbols for nucleotides and amino acids.
Nucleotides
Section titled “Nucleotides”| Symbol | Meaning | Ambiguous Symbol |
|---|---|---|
| A | Adenine | |
| C | Cytosine | |
| G | Guanine | |
| T | Thymine | |
| - | Deletion | |
| N | failed read / any | |
| R | A or G | ✔ |
| Y | C or T | ✔ |
| S | C or G | ✔ |
| W | A or T | ✔ |
| K | G or T | ✔ |
| M | A or C | ✔ |
| B | not A | ✔ |
| D | not C | ✔ |
| H | not G | ✔ |
| V | not T | ✔ |
Amino Acids
Section titled “Amino Acids”| Symbol | Meaning | Ambiguous Symbol |
|---|---|---|
| - | Deletion | |
| A | Alanine | |
| C | Cysteine | |
| D | Aspartic Acid | |
| E | Glutamic Acid | |
| F | Phenylalanine | |
| G | Glycine | |
| H | Histidine | |
| I | Isoleucine | |
| K | Lysine | |
| L | Leucine | |
| M | Methionine | |
| N | Asparagine | |
| P | Proline | |
| Q | Glutamine | |
| R | Arginine | |
| S | Serine | |
| T | Threonine | |
| V | Valine | |
| W | Tryptophan | |
| Y | Tyrosine | |
| * | Stop codon | |
| B | Aspartic Acid or Asparagine | ✔ |
| Z | Glutamine or Glutamic Acid | ✔ |
| X | Any amino acid | ✔ |