when whole steer kidney nuclei were treated with dimethyl-3,3'-dithiobisproprionimidate , n , n'-bis ( 2-carboxyimidomethyl ) tartaramide dimethyl ester , or 1-ethyl-3- ( 3-dimethylaminopropyl ) carbodiimide under approximately physiological ionic conditions , h1 histone was cross-linked to each of the four histones in the nucleosome core .
C0007610
nuclei
C0019652
histones