In direct ELISAs, approximately 10% cross-reactivity with recombinant mouse FABP9 and less than 1% cross-reactivity with recombinant human FABP1, 2, 3, 4, 5, 6, 7, and 8 is observed. Reconstitute at 0.2 mg/mL in sterile PBS. Fatty acid-binding protein 9