Question: (a) The compounds shown below are models for the active site of [FeFe]-hydrogenase. How are the models related to the active site and what problems

(a) The compounds shown below are models for the active site of [FeFe]-hydrogenase. How are the models related to the active site and what problems does a crystallographer face when trying to identify the active site?

(OC)3Fe (OC)3 Fe S S Fe(CO)3 -Fe(CO)3 (OC)3Fe S Fe (CN)(CO)2 S

(b) The molecular mass of myoglobin is ≈16950. The positive mode electrospray mass spectrum of deoxymyoglobin shows peaks at m/z 1413, 1304, 1212, 1131, 1060, 998, 942, 893, 848 and 808. Suggest assignments for the peaks and explain why the mass difference between successive peaks is not a constant value.

(OC)3Fe (OC)3 Fe S S Fe(CO)3 -Fe(CO)3 (OC)3Fe S Fe (CN)(CO)2 S S S NH Fe(CO)3 Fe (CO)(CN) 2-

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The compounds shown appear to be models for the active site of FeFehydrogenase an enzyme involved in the production and consumption of hydrogen gas This enzyme contains a complex active site often ref... View full answer

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