Assembly states of the nucleosome assembly protein 1 (NAP-1) revealed by sedimentation velocity and non-denaturing MS. by Noda, M, Uchiyama, S, McKay, A, Morimoto, A, Misawa, S, Yoshida, A, Shimahara, H, Takinowaki, H, Nakamura, S, Kobayashi, Y, Matsunaga, S, Ohkubo, T, Robinson, C, Fukui, K