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Evidence for an active dimer of Escherichia coli beta-galactosidase.


ABSTRACT: BETA-Galactosidase (EC 3.2.1.23), prepared from strains ML 308 and K12 3300 of Escherichia coli, dissociated into an inactive monomer in the presence of Ag+. When such a monomer preparation is treated with excess of thiol an enzymically active dimer is formed in addition to an active tetramer. It is suggested that Ag+ may be of value in studies on other multimeric proteins as a mild dissociating agent.

SUBMITTER: Kaneshiro CM 

PROVIDER: S-EPMC1172374 | biostudies-other | 1975 Nov

REPOSITORIES: biostudies-other

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