CAUSES OF THE PERIODIC DYNAMICS OF AROMATIC AMINO-ACID-TRANSPORT IN HALOBACTERIUM-SALINARIUM

The mechanism of the origin of the periodic fluctuations Of the intrac ellular aromatic amino acid concentration during transport into Haloba cterium salinarium cells, which lies at the basis of the ''membrane re gulation'' of their intracellular level, has been studied. It was show n that the main cause of the nonuniform dynamics of phenylalanine tran sport is the generation of periodic changes in the membrane electrical potential in the course of translocation of the amino acid. A definit e role in amino acid excretion may be played by trans-inhibition-type regulation of transport, the existence of which in cells of this micro organism has been demonstrated experimentally.