Immunogen sequence: GAFDNLLEWP FARRVTFSLL DQSDPGLAKP QHVTETFHPD PNWKNFQKPG TWRGSLDESS LGFGYPKFIS HQDIRKRNYV RDDAVFIRAA VELPRKI Highest antigen sequence identity to the following orthologs: Mouse - 99%, Rat - 99%. The tumor necrosis factor (TNF) receptor