Oscillatory reactions survey

We close this survey by pointing out that, in most cases described, the membrane serves as a transport barrier. Another possible role of a membrane was described by Schenning et al. [74], who dissolved manganese porphyrins in phospholipid membranes, into which lipidized rhodium complexes were incorporated. It was shown that this construct catalyzes the reaction HCOOH 4-02 O2 -F H2O2, and that the oxidation state of manganese oscillates in time, as detected by absorbance at 435 nm. Here the membrane colocahzes reactive centers and controls their reactions rates. These vesicle systems are therefore regarded as oscillatory enzyme mimics. 

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