The only significant changes found in the KO group in genes coding for proteins in the chylomicron synthesis pathway was a downregulation of Mttp in the first intestinal segment by KO compared to HF diet, and a significant difference between FO and KO in the expression of Acat2 (in segment 3) and Dgat1 (in segments 2 and 3). The gene discussed is DGAT1; the disease is hydrops fetalis.