Fukagawa, T., Mikami, Y., Nishihashi, A., Regnier, V., Haraguchi, T., Hiraoka, Y., Sugata, N., Todokoro, K., Brown, W. and Ikemura, T. CENP-H, a constitutive centromere component, is required for centromere targeting of CENP-C in vertebrate cells.