Abstract
The 5′-nucleotidase of Escherichia coli was shown to be located at the cell wall surface by histochemical techniques utilizing the deposition of inorganic phosphate. Penetration of the 5′-nucleotidase in the periplasmic space was seen only in cells treated with ethylenediaminetetraacetic acid (EDTA)-tris(hydroxymethyl)aminomethane (Tris). The 3′-nucleotidase of E. coli was also found to have a surface location, and periplasmic precipitation of inorganic phosphate was seen only after EDTA-Tris-sucrose exposure.
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Selected References
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