Immunogen sequence: PGIPVDANFY KLIQNGFKMD QPFYATEEIY IIMQSCWAFD SRKRPSFPNL TSFLGCQLAD AEEAMYQNVD GRVSECPHTY QNRRPFSREM DLGLLS. FLT3 is a tyrosine protein kinase that is a member of the growth factor receptor tyrosine kinase family. The receptor is activa