For cell culture experiments, LPS was removed from colominic acid (Gerbu, Heidelberg, Germany) using C18 cartridges (Thermo Fisher Scientific, Dreieich, Germany), according to manufacturer specifications, as already mentioned in [33 (link)]. Used histones were: histone from calf thymus (Sigma-Aldrich, Steinheim, Germany) and recombinant human H1, H2A, H2B, H3.1, and H4 (New England Biolabs, Frankfurt am Main, Germany). All of the reagents used were of analytical grade.
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