GNPAT and peroxisomal disease: RCDP is a recessive peroxisomal disease caused by variants in five genes: AGPS, FAR1, GNPAT, PEX5, and PEX7, which encode alkylglycerone phosphate synthase, fatty alcohol reductase 1, glycerone-phosphate O-acyltransferase, and the peroxisomal biogenesis factors 5 and 7, respectively [15–20].