Table 1.

Peptides protected from trypsin digestion in the complexes, identified by MS

Histone	NP/octamer 1:0.5	NP/H3-H4 1:2
H2A	22–33; 37–56; 83–120
H2B	34–43; 47–72; 80–86; 93–125
H3	41–49; 57–83	57–63; 73–83
H4	25–36; 47–78; 80–93	25–36; 47–56; 61–78; 81–92