At the endoplasmic reticulum (ER) membrane, a 2-monoacylglycerol (2-MAG) molecule and a diacylglycerol (DAG) molecule are transacylated by patatin-like phospholipase domain-containing proteins 2/3 (PNPLA2/3). This forms triacylglycerol (TAG) and glycerol (Jenkins et al. 2004).
Gibson, B, Yan, W, Sims, HF, Gross, RW, Jenkins, CM, Mancuso, DJ
acylglycerol O-acyltransferase activity of PNPLA2/3 [endoplasmic reticulum membrane]
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