Biochem Amino Acids

Structures and side chain Pkas

Glycine (Gly, G) (nonpolar)

Alanine (Ala, A) (nonpolar)

Proline (Pro, P) (nonpolar)

Valine (Val, V) (nonpolar)

Leucine (Leu, L) (nonpolar)

Isoleucine (Ile, I) (nonpolar)

Methionine (Met, M) (nonpolar)

Tryptophan (Trp, W) (nonpolar)

Phenylalanine (Phe, F) (nonpolar)

Serine (Ser, S) (polar)

Threonine (Thr, T) (polar)

Tyrosine (Tyr, Y) (polar)

Asparagine (Asn, N) (polar)

Glutamine (Gln, Q) (polar)

Cysteine (Cys, C) (polar)

Histidine (His, H) (polar)

Lysine (Lys, K) (positive)

Arginine (Arg, R) (positive)

Aspartate (Asp, D) (negative)

Glutamate (Glu, E) (negative)

Aspartate pKa

3.9

Glutamate pKa

4.3

Histidine pKa

6.0

Cysteine pKa

8.3

Tyrosine pKa

10.0

Lysine pKa

10.4

Arginine pKa

12.5