FABP2 and intestinal disorder: Recently, intestinal fatty acid–binding protein (I-FABP) has been suggested as a new biomarker to diagnose intestinal disease.[7–12] It was also reported to be associated with severe abdominal injuries.[13–16] I-FABP is a small (14–15 kDa), cytosolic, water-soluble protein that comprises up to 2% of the cytoplasmic protein content of the mature enterocyte, and is abundant in bowel mucosa.