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. 2015 Sep 14;290(44):26661–26674. doi: 10.1074/jbc.M115.691436

TABLE 2.

IC50 values for inhibition of ERK2 by the indicated D-site peptides

The concentration of D-site peptide required to inhibit ERK2 phosphorylation of Elk-1 by 50% (the IC50 value) is shown for the indicated peptides.

D-site peptide IC50 for inhibition of ERK2 phosphorylation of Elk-1 Increase in IC50 (relative to WT)
μm -fold
MEK2 WT (LXIXP) 9
MEK2 I14L 11 1.2
MEK2 P16L 13 1.4
MEK2 LXLXL 14 1.5