Evolution of transport systems.
D001665:Binding Sites; D005075:Biological Evolution; D001693:Biological Transport, Active; D002384:Catalysis; D002463:Cell Membrane Permeability; D004058:Diffusion; D004798:Enzymes; D005246:Feedback; D009154:Mutation; D009747:Nutritional Physiological Phenomena; D013997:Time Factors
D004798:Enzymes