TABLE 1.

Quantitation of the extent of acetylation of the individual core histones

No. of acetyl groups/histone	Avg % of total acetates (by wt) for each histonea:
	H2A			H2B			H3			H4
	U	M	H	U	M	H	U	M	H	U	M	H
0	ndb	nd	nd	73	41	16	66	43	20	98	51	24
1	nd	nd	nd	27	32	21	27	23	21	nd	35	33
2				nd	27	28	7	22	28	nd	9	24
3				nd	nd	35	nd	9	21	nd	5	15
4				nd	nd	nd	nd	3	10	2	nd	5

^aU, underacetylated octamer; M, moderately acetylated octamer; H, highly acetylated octamer. 

^bnd, not detected.