Immunogen sequence: AVYVQNVVKL YASILQQKEQ AGEAEGAQAV TQLMVDRLPQ FVQSADLEVQ ERASCILQLV KHIQKLQAKD VPVAEEVSAL FAGELNPVAP KAQKKVPVPE GLDLDAWINE PLSDSESEDE RPRAVFHEEE QRRPKHRPSE ADEEELARRR EARKQEQANN PFYIKSSPSP QKRYQDTPGV E. AP3D1 is a subunit of the AP3 ada