MKI67 and cancer: The only other protein that exhibits any sequence similarity with Ki-67 near its RVxF motif is RepoMan (recruits PP1γ onto mitotic chromatin at anaphase, also known as cell division cycle associated 2, CDCA2), a nuclear-specific protein that was discovered for its ability to specifically recruit PP1γ to chromosomes at anaphase onset and, like Ki-67, is upregulated in many cancers (Trinkle-Mulcahy et al., 2006; Vagnarelli, 2014).