Membrane transport proteins are necessary because drug diffusion across membranes is inversely related to the molecular weight and hydrogen-bonding capacity of the drug. Proteins that move compounds across memb
Plant defence metabolites arise from the main secondary metabolic routes, the phenylpropanoid, the isoprenoid and the alkaloid pathways. In plants, antibiotic compounds can be both preformed (phytoanticipins) and inducible (phytoalexins), the former including saponins, cyanogenic glycosides and ...