From: Entrez Sequences Quick Start
Entrez Sequences Help [Internet].
Bethesda (MD): National Center for Biotechnology Information (US); 2010-.
NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.
| Amino Acid Codes | |||
| A | alanine | N | asparagine |
| B | aspartate/asparagine | P | proline |
| C | cysteine | Q | glutamine |
| D | aspartate | R | arginine |
| E | glutamate | S | serine |
| F | phenylalanine | T | threonine |
| G | glycine | V | valine |
| H | histidine | W | tryptophan |
| I | isoleucine | Y | tyrosine |
| K | lysine | Z | glutamate/glutamine |
| L | leucine | X | any |
| M | methionine | ||