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J Bacteriol. 1975 September; 123(3): 1000-1005

Soluble and membrane-bound aspartate-binding activities in Salmonella typhimurium.

R R Aksamit, B J Howlett and D E Koshland Jr

ABSTRACT

The specificities of the soluble and membrane aspartate-binding activities were compared with each other and with the specificity of aspartate chemotaxis and were found to be distinct. The soluble aspartate-binding protein was purified to homogeneity and had a molecular weight of 30,000. The dissociation constant was 10(-6) M for aspartate, and the protein bound glutamate, cysteic acid, and 2-amino-3-phosphonopropionate. Aspartate transport was inhibited by cysteic acid.

J Bacteriol. 1975 September; 123(3): 1000-1005






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