Skip to main content
. 2007 Mar 12;176(6):795–805. doi: 10.1083/jcb.200701066

Figure 8.

Figure 8.

Schematic depicting centromeric chromatin composition in relation to the cell cycle. CENP-A–containing nucleosomes (red) are interspersed with canonical H3-containing nucleosomes (green) after replication in S phase, and this mixed set of nucleosomes is the substrate for nucleating kinetochore assembly in mitosis and is maintained as cells exit in anaphase. CENP-A assembly initiates in telophase and proceeds through early G1 (presumably concurrent with removal of H3 nucleosomes). CENP-A– and H3-containing nucleosomes are stylized as single nucleosomes but may represent continuous alternating arrays of one or the other type. In mitosis, CENP-A nucleosomes may coalesce to form a rigid interface for kinetochore formation as proposed previously (Zinkowski et al., 1991; Blower et al., 2002; Black et al., 2004, 2007a,b).