This entry includes Spd2 (spindle-defective protein 2) from Caenorhabditis elegans, CEP192 (centrosomal protein of 192kDa) from humans, and homologues from metazoa and fungi. Spd2 is required both for centrosome duplication and maturation [, , ]. CEP19 is required for mitotic centrosome and spindle assembly []. They are required for pericentriolar material (PCM) recruitment [, , ].