. 2020 Oct 7;10(61):37005–37013. doi: 10.1039/d0ra07636h

pK_α values and isoelectric points (pI) of the amino acids used in this work; from Nelson and Cox¹⁸.

Amino acid	Sample code	pK_α COOH	pK_α NH₂	pK_α side chain	pI
Glycine	Gly	2.34	9.6		5.97
Arginine	Arg	2.17	9.04	12.48 (guanidino)	10.76
Glutamate	Glu	2.19	9.67	4.25 (γ-COOH)	3.22

pKα values and isoelectric points (pI) of the amino acids used in this work; from Nelson and Cox18.