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Uptake by Yeast: Interaction of Rb + , Na + and Phosphate
Author(s) -
BORSTPAUWELS G. W. F. H.,
THEUVENET A. P. R.,
PETERS P. H. J.
Publication year - 1975
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1975.tb03755.x
Subject(s) - phosphate , yeast , chemistry , ion , radiochemistry , nuclear chemistry , inorganic chemistry , biochemistry , organic chemistry
It has been shown that addition of phosphate to phosphate deficient yeast gives rise to an immediate increase in the rate of Na + uptake and an immediate decrease in the rate of Rb + uptake. In addition, phosphate uptake is enhanced specifically by Na ions presumably by a process with a very high affinity for phosphate with a K m of about 2 × 10 −6 M at pH 7.2, whereas the K m for phosphate uptake of the Na + independent process amounts to 1.3 × 10 −4 M.