part of nuclear chromosome kinetochore COMA complex https://github.com/geneontology/go-ontology/issues/21126 cellular_component Ctf19p-Okp1p-Mcm1p-Ame1p complex GO:0000817 A kinetochore multiprotein complex that bridges the subunits that are in contact with centromeric DNA and the subunits bound to microtubules during kinetochore assembly. In yeast, consists of Ctf19p, Okp1p, Mcm21p, and Ame1p. nuclear protein-containing complex