Table 1.

Relative basal abundance of discrete H4 PTMs

	SUM159 cells (%)	MCF7 cells (%)
Nα-ac	98.2 ± 0.6	96.4 ± 0.9
S1ph	0.1 ± 0.0	0.2 ± 0.1
R3me1	0.2 ± 0.1	0.2 ± 0.1
K5ac	2.0 ± 0.4	3.2 ± 0.7
K8ac	1.7 ± 0.6	1.1 ± 0.2
K12ac	6.0 ± 1.4	3.3 ± 0.6
K16ac	40.6 ± 2.4	35.8 ± 0.9
K20me1	12.2 ± 1.3	7.7 ± 0.6
K20me2	76.2 ± 1.6	78.7 ± 1.3
K20me3	8.3 ± 1.1	10.1 ± 0.7
K20un	3.3 ± 1.1	3.4 ± 0.8
K31ac	7.2 ± 1.1	7.5 ± 0.8