Japanese Journal of Microbiology
Print ISSN : 0021-5139
Aspartic Acid Transport in Mycobacterium smegmatis
Kunihiko YABU
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1971 Volume 15 Issue 5 Pages 449-456

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Abstract
L-Aspartic acid was taken up by Mycobacterium smegmatis cells at a greater rate than D-aspartic acid. Kinetic studies of L-aspartic acid uptake revealed a curvilinear Line-weaver-Burk plot. The observed kinetics could be accounted for by the existence of two different processes, a saturable and a nonsaturable. In contrast, the latter process was solely active for D-aspartic acid uptake. Competition studies indicated that aspartic acid and glutamic acid were similarly affected by the operation of 2 different processes. The existence of 2 similar catalytic transport processes, specific for dicarboxylic amino acids, was discussed.
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