Blast analysis showed that HSD45 was identical to INCA1 (Inhibitor of CDK interacting with Cyclin A1), a novel cyclin A1/CDK2 interaction partner in a yeast-triple hybrid approach.

• Blast分析发现HSD45与一新基因完全相同。 该基因因能通过与cyclin A1相互作用抑制CDK的活性，故命名为INCAl(Inhibitor of CDK interacting with Cyclin A1)。