Immunogen sequence: QPKNPKSQEP VTLDFLDAEL ENDIKVEIRN KMIDGESGEK TFRTLVKSQD ERYIDKGNRT YTWTPVNGTD YSLALVLPTY SFYYIKAKLE ETITQARSKK GKMKDSETLK PDNFEESGYT FIAPRDYCND LKISDNNTEF L. This gene encodes a member of the alpha-2/delta subunit family, a protein in