Unveiling an Ultrareduced State of Heme in Myoglobin

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Spectroscopic analyses unveil a novel ultrareduced myoglobin state, suggesting implications for metal proteins and reduction processes.

The study details the conversion of sperm whale myoglobin to an ultrareduced heme state via chemical reduction.
Spectroscopic analyses indicate a proton-coupled two-electron reduction leading to a new ultrareduced species.
The newly identified Por(2e)Fe(II)-Mb demonstrates high-spin properties and is linked to nitrogen reduction reactions.
These findings enhance the understanding of heme iron states in native hemoproteins and their applications in biotechnology.

Deng et al. (2025) studied this question.

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