Immunogen sequence: MATNFSDIVK QGYVKMKSRK LGIYRRCWLV FRKSSSKGPQ RLEKYPDEKS VCLRGCPKVT EISNVKCVTR LPKETKRQAV AIIFTDDSAR TFTCDSELEA EEWYKTLSVE CLGSRLNDIS LGEPDLLAPG VQCEQTDRFN VFLLPCPNLD VYGECKLQIT HENIYLWDIH NPRVKLVSWP LCSLRRYGRD ATRFTFEAGR MCDAGEGLYT FQT