Alanine (Ala-A), Nonpolar, aliphatic pKa= n/a Arginine (Arg, R), Positively charged pKa=12.48 Asparagine (Asn, N), Polar, non charged pKa = n/a Aspartate (Asp, D), Negatively charged pKa=3.65 Cysteine (Cys - C), Polar, non charged pKa=8.3 Glutamate (Glu - E), Negatively charged pKa=4.25 Glutamine (Gln, Q), Polar, non charged pKa = n/a Glycine (Glc- G), Nonpolar, aliphatic pKa = n/a Histidine (His, H) (His, H), Positively charged pKa=6.0 Isoleucine (Ile - I), Nonpolar, aliphatic pKa = n/a Leucine (Leu - L), Nonpolar, aliphatic pKa=10.5 Lysine (Lys - K), Positively charged pKa = 10.53 Methionine (Met - M), Nonpolar, aliphatic pKa= n/a Phenylalanine (Phe - F), Aromatic pKa = n/a Proline (Pro - P), Nonpolar, aliphatic pKa = n/a Serine (Ser - S), Polar, non charged pKa= n/a Threonine (Thr - T), Polar, non charged pKa = n/a Tryptophan (Trp - W), Aromatic Pka = n/a Tyrosine (Tyr - Y), Aromatic pKa = 10 Valine (Val - V), Nonpolar, aliphatic pKa= n/a