AMINO ACID TRANSPORT IN THE LENS.

摘要: Most arnino acids usually found in other tissues are present the lens. In rabbit all of these compounds concentrations higher than those aqueous humors and much vitreous humor. Accumulation takes place through active transport by processes which require glucose, anaerobic utilization can provide energy needed to maintain normal concentration gradients. The mechanisms responsible for amino probably confined epithelium, highly temperature dependent, be inhibited various metabolic poisons selectively, varying degrees, each other. At least three systems, one neutral, acidic, basic acids, appear involved their transport. steady state lens is determined balance between rate entrance exit diffusion. -L ifty years ago Van Slyke Meyer 1 traced ammo from intestine into blood, then where they were concentrated five- tenfold. Only recent has been shown exceed that ocular fluids bathe it, 2 have investigations factors concerned with accumulation led some clarification kinetics site action systems 3 " 5 transport, when applied exchange substances its environment, not same things. difference quantity a substance enters leaves it any means,