He also showed that the gradients of pH and membrane potential generated by the primary proton pump in the plasmalemma could be used to drive secondary active transport of other solutes, sugars, amino acids and other ions.
12.
In a famous 1967 paper The Renewal of Photoreceptor Cell Outer Segments Professor Richard Young described his observations that new discs are assembled at the base of the outer segment the ciliary plasmalemma by incorporating proteins and lipids that are synthesized and transported from the inner segment.
13.
His demonstration ( in 1972 ) that the most important transport system in the plasmalemma of Characean cells is a proton-pumping ATPase, generating membrane potentials well negative of the potassium equilibrium potential, was a major advance & Previously plant physiologists had assumed that plant cells were like animal cells, with an ATP-dependent sodium-potassium exchange pump as the major process of active ion transport.
