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. Author manuscript; available in PMC: 2016 Aug 19.
Published in final edited form as: Geomicrobiol J. 2015 Aug 19;32(7):570–576. doi: 10.1080/01490451.2014.908983

Fig. 3. Structure of CmArsM.

Fig. 3

The crystal structures of CmArsM with bound As(III) and bound SAM were superimposed, yielding a model in which the methyl group of SAM is poised for transfer from SAM to As(III) a distance of 5.2 Å. Arrow: The electron density of the As(III) binding residues are fitted with stick models of Cys72, Cys174 and Cys224.