Pgp is an extraordinaryily interesting protein because it appears to be involved in many of the phenomena which are of fundamental interest in modern biochemistry. Kinetics, lipids, protein folding, structure and mutant analysis, signal transduction and reaction mechanisms can all be applied to the study of Pgp. As such a vital protein in the maintenance of health as well as the proliferation of cancer cells, a precise understanding of the biochemistry of Pgp will truly benefit medical science, oncology in particular. For this reason, it is likely that studies of the structure and function of Pgp will be active areas of biomedical research until the mechanisms of Pgp function are thoroughly understood.