One common lipid metabolism alteration in EBV infection is the increased expression of fatty acid synthase (FASN), an enzyme that plays a key role in the cell endogenous fatty acid synthesis (FAS) mediating the multiple condensation reaction between malonil-CoA and acetyl-CoA molecules which leads to the palmitate FAS (Figure 2). The gene discussed is FASN; the disease is Epstein-Barr virus infection.