Immunogen sequence: AARANSLQLL SPQPGEQLPP EMTVARSSVK ETSREGTSSF HTRQKSEGGV YHDPHSDDGT APKENRHLYN DPVPRRVGSF YRVPSPRPDN SFHENNVSTR VSSLPSESSS GTNHSKRQPA FDP. CDKL5 serine/threonine kinase (STK9) is associated with X-linked infantile spasm syndrome (ISSX),