Table 2.
Name | Acidic | Basic | Neutral | pKa1 (α-Carboxyl Group) | PKa2 (α-Amino Group) | pKa3 (Side Chain) | pI (Isoelectronic Point) |
---|---|---|---|---|---|---|---|
Alanine | √ | 2.34 | 9.69 | 6.00 | |||
Arginine | √ | 2.17 | 9.04 | 12.48 | 10.76 | ||
Asparagine | √ | 2.02 | 8.80 | 5.41 | |||
Aspartic acid | √ | 1.88 | 9.60 | 3.65 | 2.77 | ||
Cysteine | √ | 1.96 | 10.28 | 8.18 | 5.07 | ||
Glutamic acid | √ | 2.19 | 9.67 | 4.25 | 3.22 | ||
Glutamine | √ | 2.17 | 9.13 | 5.65 | |||
Glycine | √ | 2.34 | 9.60 | 5.97 | |||
Histidine | √ | 1.82 | 9.17 | 6.00 | 7.95 | ||
Isoleucine | √ | 2.36 | 9.60 | 6.02 | |||
Leucine | √ | 2.36 | 9.60 | 5.98 | |||
Lysine | √ | 2.18 | 8.95 | 10.53 | 9.74 | ||
Methionine | √ | 2.28 | 9.21 | 5.74 | |||
Phenylalanine | √ | 1.83 | 9.13 | 5.48 | |||
Proline | √ | 1.99 | 10.60 | 6.30 | |||
Serine | √ | 2.21 | 9.15 | 5.68 | |||
Threonine | √ | 2.09 | 9.10 | 5.60 | |||
Tryptophan | √ | 2.83 | 9.39 | 5.89 | |||
Tyrosine | √ | 2.20 | 9.11 | 10.07 | 5.66 | ||
Valine | √ | 2.32 | 9.62 | 5.96 |