An aurora kinase that is a component of the chromosomal passenger protein complex and is involved in the regulation of MITOSIS. It mediates proper CHROMOSOME SEGREGATION and contractile ring function during CYTOKINESIS.

Synonyms: Serine Threonine Protein Kinase 12 Aurora Kinase B B Kinase, Aurora EC 2.7.11.1 Aurora-Related Kinase 2 Aurora B Kinase Serine-Threonine Protein Kinase 12 Aurora Kinases B Kinase, Aurora B Aurora Related Kinase 2 Aurora B Kinases