Chemical structures of the ligand set. (a) 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (PC), (b) hydroxylated PC with 2ROHOA (2ROHPC), (c) hydroxylated PC with 2SOHOA (2SOHPC), (d) N-oleoyl-d-erythro-sphingosylphosphorylcholine (SM), (e) hydroxylated SM with 2ROHOA (2ROHSM), (f) hydroxylated SM with 2SOHOA (2SOHSM). (g) (S)-1-hydroxy-3-(palmitoyloxy)propan-2-yl oleate (DAG), (h) hydroxylated DAG with 2ROHOA (2ROHDAG), (i) hydroxylated DAG with 2SOHOA (2SOHDAG), (j) ceramide N-((2S,3R,E)-1,3-dihydroxyoctadec-4-en-2-yl)oleamide (Cer), (k) hydroxylated Cer with 2ROHOA (2ROHCer), (l) hydroxylated Cer with 2SOHOA (2SOHCer).