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Modern Genetic Analysis Chapter 3. Gene Function Protein Structure
Table 3-1. The 20 Amino Acids Common in Living Organisms

| Abbreviation

Amino Acid | 3-Letter | 1-Letter

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

© 1999 by W. H. Freeman and Company. All rights reserved.