Journal
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
Volume 204, Issue 1-3, Pages 1-6Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S1387-3806(00)00343-2
Keywords
metal ion flux; reaction stoichiometry; zinc finger peptides; metallothionein; noncovalent complexes
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Electrospray and nanospray ionizations are used to study the transfer of zinc ions between Zn-7-metallothionein and apo peptides that are models for several kinds of zinc finger proteins. A membrane experiment is reported here which demonstrates that interprotein contact is required for these transfers. Analysis on a quadrupole ion trap has allowed all reactants and all products to be monitored simultaneously. Evidence is provided for the preferential transfer of a single zinc ion from each Zn-7-metallothionein complex. (C) 2001 Elsevier Science B.V.
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