C20:4-Gly-d8, C20:4-Ser, GSK1016790A, PGE2, and the COX (ovine) Colorimetric Inhibitor Screening Assay Kit were purchased from Cayman Chemical Company; capsaicin, glutamine, phenylalanine, and oleic acid were purchased from Sigma; 2-APB was purchased from Santa Cruz Biotechnology; and C20:4-Phe was purchased from Abcam. The synthesis of C18:1-Phe, C18:1-Leu, C18:1-Gln, and C18:1-Lys has been described previously (8 (link)). Plasmids were obtained from the following sources: C-terminally tagged mouse TRPV1 (catalog no. MR227160; OriGene), C-terminally tagged human TRPV3 (catalog no. RC211184; OriGene); C-terminally tagged rat TRPV4 (plasmid no. 45751; Addgene); and pTurboRFP-Mito (catalog no. FP237; Evrogen). Mouse TRPA1 was a generous gift from Jorg Grandl, Duke University, Durham, NC. C2C12 cells and HEK293A cells were obtained from ATCC and Thermo Fisher Scientific, respectively.