Robuta

https://www.ncbi.nlm.nih.gov/Structure/pdb/5NUQ 5NUQ: Structural basis for maintenance of bacterial outer membrane lipid asymmetry Outer membrane protein FProbable phospholipid-binding lipoprotein mlaA(HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE bacterial outer membranefor maintenancestructuralbasis https://elifesciences.org/articles/40308 Evolutionary pathways of repeat protein topology in bacterial outer membrane proteins | eLife There is a strand-based evolutionary mechanism for the diversification of outer membrane proteins, which has implications for how repeat proteins are created... bacterial outer membraneprotein topology