Lysine

3-letter Code
Lys
1-letter Code
K
Side-Chain Polarity
  • Basic Polar
Side-Chain Class
  • Basic
Side-Chain Charge
Positive
pI
9.60
pKa (α-COOH)
2.16
pKa (α-NH3+)
9.06
pKa (Side-Chain)
10.54
Avg. Residue Mass (Da)
128.17
Monoisotopic Mass (Da)
128.09
MW (Da)
146.19
Hydropathy Index
-3.90
van der Waals Volume
135
Optical Properties
Wikipedia Entry