Immunogen sequence: TEYQCIPDST IPQEDYRCWP SYHHGSCLLS VFNLAEAVDV CESHAQCRAF VVTNQTTWTG RQLVFFKTGW SQVVPDPNKT T. VLK was identified as a novel protein kinase that was induced after the differentiation of cultured embryonic stem cells into mesendoderm. It h