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. 2011 Mar 25;6(3):e14765. doi: 10.1371/journal.pone.0014765

Table 1. Activation energy barriers between conformations.

g+→g g→g+ g+→t t→g+ g→t t→g
H3K4me3 1.8 1.8 1.8 1.8 1.8 1.8
H4K20me3 1.9 1.9 1.9 1.9 1.9 1.9
H4K20me2 4.2 2.7 0.9 0.8 1.1 2.4
H3K9me3 1.7 1.7 1.7 1.7 1.7 1.7

All values are in kcal/mol units and are with respect to an arbitrary datum line.