Immunogen sequence: MEQLRAAARL QIVLGHLGRP SAGAVVAHPT SGTISSASFH PQQFQYTLDN NVLTLEQRKF YEENGFLVIK NLVPDADIQR FRNEFEKICR KEVKPLGLTV MRDVTISKSE YAPSEKMITK VQDFQEDKEL FRYCTLPEIL KYVECFTGPN IMAMHTMLIN KPPDSGKKTS RHPLHQDLHY FPFRPSDLIV CAWTAMEHIS RNNGCLVVLP GTH