In direct ELISAs and Western blots, less than 1% cross-reactivity with recombinant mouse 4-1BB Ligand, recombinant human (rh) APRIL, rhBAFF, rhEDA-A2, rhFas Ligand, rhGITR Ligand, rhLIGHT, rhOX40 Ligand, rhTNF-alpha, rhTRAIL, and rhTWEAK is observed. Rec