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Published on: December 12, 2016
Cryoradiolytic reduction of heme proteins: Maximizing dose dependent yield
Ilia G Denisov1, Doreen C Victoria, Stephen G Sligar
1University of Illinois Urbana-Champaign, Department of Biochemistry, Urbana IL, 61801.
Abstract:
Radiolytic reduction in frozen solutions and crystals is a useful method for generation of trapped intermediates in protein based radical reactions. In this communication we define the conditions which provide the maximum yield of one electron reduced myoglobin at 77 K using (60)Co γ-irradiation in aqueous glycerol glass. The yield reached 50% after 20 kGy, was almost complete at ∼160 kGy total dose, and does not depend on the protein concentration in the range 0.01 - 5 mM.
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