this latter finding offers direct support to the proposal of goldknopf ( goldknopf , i. l. , french , m. f. , musso , r. , and busch , h. ( 1977 ) proc . natl . acad . sci . u. s. a . 74 , 5492-5495 ) that protein a24 replaces histone h2a in the octamer protein core of the nucleosome , since about 10 % of the total histone h2a of cultured mouse cells is in the form of protein a24 and is present in nucleosomes .
C0019646
histone h2a
C0028623
nucleosomes