Immunogen sequence: VRALDSDFGE SGRLTYEIVD GNDDHLFEID PSSGEIRTLH PFWEDVTPVV ELVVKVTDHG KPTLSAVAKL IIRSVSGSLP EGVPRVNGEQ HHWDMSLPLI V. This gene belongs to the protocadherin gene family, a subfamily of the cadherin superfamily. The encoded protein contains