Immunogen sequence: PAPGFPFPPP WMGMPLPPPF AFPPMPVPPA GFAGLTPEEL RALEGHERQH LEARLQSLRN IHTLLDAAML QINQYLTVLA SLGPPRPATS VNSTEETATT VVAAASSTSI PSSEATTPTP GASPPAPEME RPPAPESVGT. HRD1 is a ubiquitin ligase whose expression is induced by the unfolded protein