%0 Journal Article %T Membranes are functionalized by a proteolipid code. %A Kervin TA %A Overduin M %J BMC Biol %V 22 %N 1 %D 2024 Feb 27 %M 38414038 %F 7.364 %R 10.1186/s12915-024-01849-6 %X Membranes are protein and lipid structures that surround cells and other biological compartments. We present a conceptual model wherein all membranes are organized into structural and functional zones. The assembly of zones such as receptor clusters, protein-coated pits, lamellipodia, cell junctions, and membrane fusion sites is explained to occur through a protein-lipid code. This challenges the theory that lipids sort proteins after forming stable membrane subregions independently of proteins.