In sandwich ELISAs, less than 0.1% cross-reactivity with recombinant mouse (rm) Cerberus, rmGremlin, rmDAN, recombinant human (rh) COCO, rhGremlin, and rmBMP-4 is observed. Reconstitute at 0.2 mg/mL in sterile PBS. GREM2 encodes a member of the BMP (bone