Representative structures of membrane proteins (blue) resolved experimentally with various types of lipids (carbon: yellow, oxygen: red, nitrogen: blue): bacteriorhodopsin (BR) with diphytanylglycerol (DPG) (PDB:2BRD), oxysterol-binding homology protein 6 (Osh6) with phosphatidylserine (PS) (PDB:4B2Z), human phospholipase D (NAPE-PLD) with phosphatidylethanolamine (PE) (PDB:4QN9), trimeric intracellular cation (TRIC) channel with phosphatidylinositol bisphosphate (PIP2) (PDB:5EGI), betaine transporter (BetP) with phosphatidylglycerol (PG) (PDB:4C7R), aquaporin-0 (AQP) with phosphatidylcholine (PC) (PDB:2B6O), cytochrome c oxidase (CcO) with cardiolipin (CDL) (PDB:5XDX), alternative complex III (ACIII) with triacylated cysteine (TAC) (PDB:6BTM), ATP-binding cassette (ABC) transporter MRP1 with cholesterol (CHL) (PDB:6BHU).