Tryptophan-to-heme electron transfer in ferrous myoglobins.

Abstract

It was recently demonstrated that in ferric myoglobins (Mb) the fluorescence quenching of the photoexcited tryptophan 14 (*Trp(14)) residue is in part due to an electron transfer to the heme porphyrin (porph), turning it to the ferrous state. However, the invariance of *Trp decay times in ferric and ferrous Mbs raises the question as to whether electron… (More)
DOI: 10.1073/pnas.1423186112

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