In direct ELISAs and Western blots, no cross-reactivity with recombinant mouse (rm) 4-1BB, rmBAFF R, rmCD27, rmCD30, rmCD40, rmDcTRAIL R1, rmDR3, rmEDAR, rmFas, rmGITR, rmHVEM, rmLT beta R, rmNGF R, rmOPG, rmOX40, rmRANK, rmTNF RI, and rmTNF RII is obser