O sterile 20-like kinase 1 serine/threonine kinase 4 Gene http://identifiers.org/mgd/MGI:1929004 + Ysk3 MGI:1929004 protein coding gene Kas-2 Stk4 Mst1|sterile 20-like kinase 1|Kas-2|Ysk3 Mst1 genetic mapping