Acts as a component of the essential kinetochore-associated NDC80 complex, which is required for chromosome segregation and spindle checkpoint activity to ensure proper cell division. Component of the NDC80 complex, which consists of NDC80, NUF2, SPC24 and SPC25. Embryonic lethality due to division arrest before the globular stage. Belongs to the NUF2 family. The predicted gene has been split into 2 genes: At1g60995 and At1g61000.