Archive image from page 332 of Currents in biochemical research, 1956;. Currents in biochemical research, 1956; twenty-seven essays charting the present course of biochemical research and considering the intimate relationship of biochemistry to medicine, physiology, and biology currentsinbioche1956gree Year: 1956 ( ENZYME-SUBSTRATE COMPOUNDS complex I are observed spectrophotometrically up to very high peroxide concentrations would provide evidence that the formation of complex I is so rapid that no other intermediate tlian complex I would have tiine to be forined in the reaction. Pushing
Archive image from page 332 of Currents in biochemical research, 1956;. Currents in biochemical research, 1956; twenty-seven essays charting the present course of biochemical research and considering the intimate relationship of biochemistry to medicine, physiology, and biology currentsinbioche1956gree Year: 1956 ( ENZYME-SUBSTRATE COMPOUNDS complex I are observed spectrophotometrically up to very high peroxide concentrations would provide evidence that the formation of complex I is so rapid that no other intermediate tlian complex I would have tiine to be forined in the reaction. Pushing Block Syringe Plunger Syringe Stopcock Supporting Franne Beaker to receive residual HpOp Fig. 1. Quenching type of Hartridge-Roughton flow apparatus used for the investigation of catalase activity at high hydrogen peroxide concen- trations (17). A pair of 2-mI. tuberculin-type syringes contain, respectively, 1-5 M H2O2 and about 10' A/ enzyme. Enzyme and substrate are forced into the mixing cham- ber by the pushing block and flow down the reaction tube a distance corresponding to to sec. Sulfuric acid is then rapidly mixed to stop the reaction. The remaining peroxide is back titrated with permanganate (FA-20). 311
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