Lehninger AL, 1982

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Lehninger AL, 1982

Lehninger reports a nearly complete set of pK values in the first edtion of his classic biochemistry text book, Principles of Biochemistry (1982) (1). The pK values are for the free amino acids in solution, as that is the area in which they are introduced, and these values are applied to problems relating to the free amino acids.

Amino acid pK values from Lehninger AL, 1982 (1).

Group

2.18

†‡

ASP

3.86

†

GLU

4.25

†

HIS

6.0

†

9.55

†¶

CYS

8.33

†

TYR

10.07

†

LYS

10.53

†

ARG

12.48

†

† Data from Table 5-4.

‡ This value is derived from these data by determining the mean value of the carboxylic acid pK values for the thirteen amino acids listed in Table 5-4 (ALA, CYS, ASP, GLU, GLY, HIS, LYS, LEU, GLN, ARG, SER, THR, TYR).

¶ This value is derived from these data by determining the mean value of the amino group pK values for the thirteen amino acids listed in Table 5-4 (ALA, CYS, ASP, GLU, GLY, HIS, LYS, LEU, GLN, ARG, SER, THR, TYR).

References

(1) Lehninger, AL (1982) Principles of Biochemistry, Worth Publishers, New York