spindle checkpoint protein-related. similar to protein kinase-related [Arabidopsis thaliana] (TAIR:AT5G05510.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO66302.1); contains InterPro domain Mitotic checkpoint serine/threonine protein kinase, Bub1 (InterPro:IPR015661); contains InterPro domain Mad3/BUB1 homology region 1 (InterPro:IPR013212)