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. 2003 Aug;85(2):686–694. doi: 10.1016/S0006-3495(03)74512-3

TABLE 2.

Theoretical apparent pK values of a histidine in lysozyme as deduced from the pH that give z+ = 0.5

Salt concentration B = 0 × 10−50 J m3 B = −10 × 10−50 J m3 B = −15 × 10−50 J m3
0.02 M 5.45 5.51 5.61
0.10 M 5.58 5.72 5.90
0.50 M 5.74 5.98 6.20

The actual pK value used to model the histidine was 6.0.