GENERAL REFERENCE INFORMATION

Common Amino Acids, Their Symbols, and Molecular Weights

peptides
Amino Acid Three Letter Code Single Letter Code Molecular Weight
Alanine Ala A 71.08·18.02
Arginine Arg R 156.19·18.02
Aspartic Acid Asp D 115.09·18.02
Asparagine Asn N 114.10·18.02
Cysteine Cys C 102.14·18.02
Glutamic Acid Glu E 129.12·18.02
Glutamine Gln Q 128.13·18.02
Glycine Gly G 57.05·18.02
Histidine His H 137.14·18.02
Hydroxyproline Hyp - 113.05·18.02
Isoleucine Ile I 113.06·18.02
Leucine Leu L 113.06·18.02
Lysine Lys K 128.18·18.02
Methionine Met M 131.20·18.02
Norleucine Nle - 113.06·18.02
Ornithine Orn - 114.15·18.02
Phenylalanine Phe F 147.18·18.02
Proline Pro P 97.12·18.02
Pyroglutamic Acid pGlu or Pyr < E 111.03·18.02
Sarcosine Sar - 71.08·18.02
Serine Ser S 87.08·18.02
Threonine Thr T 101.11·18.02
Tryptophan Trp W 186.22·18.02
Tyrosine Tyr Y 163.18·18.02
Valine Val V 99.13·18.02

Residues color coded by side chain properties

Non-Polar Polar Basic Acidic
peptides
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