Immunogen sequence: RPPFDTDTVK NTLNKVVLAD YEMPSFLSIE AKDLIHQLLR RNPADRLSLS SVLDHPFMSR NSSTKSKDLG TVEDSIDSGH ATISTAITAS SSTSISGSLF DKRRLLIGQP LPNKMTVFPK NKSSTDFSSS GDGNS. PLK4 or polo-like kinase 4 is a member of the polo family of serine/threonine protei