Phospholipids (PL). In this whole cell analysis, the primary PLs that were significantly regulated (Anova p,0.05) (and subsequently structurally identified) were mostly neutral or zwitterionic. PS was the only acidic lipid significantly regulated. At 36 hr post-infection, there was an ,2 fold up-regulation of PC species in DENV-infected cells compared to UV-DENV and mock controls ( Figure 3A ). At the later time point (60 hr post-infection), the relative levels of PC remained elevated in DENV-infected cells, however the differential expression between DENV and UV-DENV-exposed cells was not as evident ( Figure 3B ). Selected PC species were up regulated only at the 36 hr time point while others were up regulated at both time points ( Figure 3C ). Interestingly, a majority (,80%) of the PC species that were up regulated had unsaturated fatty acyl chains.