Protein Residue, position, observed pKa shift Residue, position, observed pKa shift
HSA Lys, 199, ~7.51 Arg, 222, ~9.49
BSA Arg, 199, ~9.24 Lys, 221, ~7.27
RabSA Arg, 199, ~16.53 Arg, 222, ~8.25