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Abstract An acid phosphatase from a heavy-metal-accumulating strain of a Citrobacter sp. was resolved into two forms on the basis of their nonbinding (phosphatase I) or binding (phosphatase II) behaviour on the cation-exchange resin SP-Sephadex C50. Both holoenzymes had a molecular mass of 103108 kDa as determined by Superose Q-6 column chromatography in the presence of 150 mM KCl and a subunit molecular...
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