Immunogen sequence: KPEKPSTLQR PQETVIRELQ PQQQPRTIER RDLQYITVSK EELSSGDSLS PDPWKRDAKE KLEKQQQMHI VDMLSKEIQE LQSKPDRSAE ESDRLRKLML EWQ. AFDN belongs to an adhesion system, probably together with the E-cadherin-catenin system, which plays a role in the org