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. Author manuscript; available in PMC: 2011 Jan 29.
Published in final edited form as: Biol Magn Reson. 2010 Jan 1;29(2):121–168. doi: 10.1007/978-1-4419-1139-1_6

Scheme 2.

Scheme 2

Proposed reactions for formation of the Mo(V) forms of pl-SO observed by EPR. (1) pl-SO species formed by sulfite reduction at low pH that shows no exchangeable protons; (2) hpH species formed in both pl-SO and vertebrate SO; (3) lpH species formed in both pl-SO and vertebrate SO by direct reduction of the Mo(VI) center.