Amino Acid Reference Chart
| Chemical Name | Chemical Structure | CAS Number | 1-Letter Amino Acid Code | 3-Letter Amino Acid Code | Molecular Formula | Molecular Weight | Residue Formula | Residue Molecular Weight | Classification |
|---|---|---|---|---|---|---|---|---|---|
| Aspartic acid |
|
56-84-8 | D | Asp | C4H7NO4 | 133.11 | C4H5NO3 | 115.09 | Acidic, negatively charged |
| Glutamic acid |
|
56-86-0 | E | Glu | C5H9NO4 | 147.13 | C5H7NO3 | 129.12 | Acidic, negatively charged |
| Arginine |
|
74-79-3 | R | Arg | C6H14N4O2 | 174.2 | C6H12N4O | 156.19 | Basic, positively charged |
| Histidine |
|
71-00-1 | H | His | C6H9N3O2 | 155.16 | C6H7N3O | 137.14 | Basic, positively charged |
| Lysine |
|
56-87-1 | K | Lys | C6H14N2O2 | 146.19 | C6H12N2O | 128.18 | Basic, positively charged |
| Glycine |
|
56-40-6 | G | Gly | C2H5NO2 | 75.07 | C2H3NO | 57.05 | Polar,uncharged |
| Serine |
|
56-45-1 | S | Ser | C3H7NO3 | 105.09 | C3H5NO2 | 87.08 | Polar,uncharged |
| Threonine |
|
72-19-5 | T | Thr | C4H9NO3 | 119.12 | C4H7NO2 | 101.11 | Polar,uncharged |
| Cysteine |
|
52-90-4 | C | Cys | C3H7NO2S | 121.16 | C3H5NOS | 103.15 | Polar,uncharged |
| Asparagine |
|
70-47-3 | N | Asn | C4H8N2O3 | 132.12 | C4H6N2O2 | 114.11 | Polar,uncharged |
| Glutamine |
|
56-85-9 | Q | Gln | C5H10N2O3 | 146.15 | C5H8N2O2 | 128.13 | Polar,uncharged |
| Hydroxyproline |
|
51-35-4 | O | Hyp | C5H9NO3 | 131.13 | C5H7NO2 | 113.11 | Polar,uncharged |
| Pyroglutamatic acid |
|
98-79-3 | U | Glp, Pyr | C5H7NO3 | 139.11 | C5H5NO2 | 121.09 | Polar,uncharged |
| Tyrosine |
|
60-18-4 | Y | Tyr | C9H11NO3 | 181.19 | C9H9NO2 | 163.18 | Polar,uncharged |
| Alanine |
|
56-41-7 | A | Ala | C3H7NO2 | 89.1 | C3H5NO | 71.08 | Nonpolar, uncharged |
| Valine |
|
72-18-4 | V | Val | C5H11NO2 | 117.15 | C5H9NO | 99.13 | Nonpolar, uncharged |
| Isoleucine |
|
73-32-5 | I | Ile | C6H13NO2 | 131.18 | C6H11NO | 113.16 | Nonpolar, uncharged |
| Leucine |
|
61-90-5 | L | Leu | C6H13NO2 | 131.18 | C6H11NO | 113.16 | Nonpolar, uncharged |
| Methionine |
|
63-68-3 | M | Met | C5H11NO2S | 149.21 | C5H9NOS | 131.2 | Nonpolar, uncharged |
| Phenylalanine |
|
63-91-2 | F | Phe | C9H11NO2 | 165.19 | C9H9NO | 147.18 | Nonpolar, uncharged |
| Proline |
|
147-85-3 | P | Pro | C5H9NO2 | 115.13 | C5H7NO | 97.12 | Nonpolar, uncharged |
| Tryptophan |
|
73-22-3 | W | Trp | C11H12N2O2 | 204.23 | C11H10N2O | 186.22 | Nonpolar, uncharged |