AMINO ACID ABBREVIATIONS AND pKa VALUES

NAME ABBREVIATIONS pKa VALUES

3 Letter 1 Letter —COOH —NH3+ R group

Alanine Ala A 2.34 9.69Arginine Arg R 2.17 9.04 12.48Asparagine Asn N 2.01 8.8Aspartic Acid Asp D 1.89 9.60 3.65Cysteine Cys C 1.96 8.18 10.29Glutamine Gln Q 2.17 9.13Glutamic Acid Glu E 2.19 9.67 4.25Glycine Gly G 2.34 9.6Histidine His H 1.8 9.17 6.00Isoleucine Ile I 2.35 9.68Leucine Leu L 2.36 9.60Lysine Lys K 2.18 8.95 10.52Methionine Met M 2.28 9.2Phenylalanine Phe F 1.83 9.12Proline Pro P 1.99 10.96Serine Ser S 2.21 9.15 13.6Threonine Thr T 2.11 9.62 13.6Tryptophan Trp W 2.38 9.39Tyrosine Tyr Y 2.2 9.11 10.06Valine Val V 2.32 9.61