Nitrogen cycle enzymes connection

Other enzymes connected with nitrogen cycling... 

In summary, this mechanistic hypothesis has a number of stereoelectronic features that are tightly coordinated to create an efficient enzymatic process. Formation of H MPT via removal of the axial C-H is favored by the combined stereoelectronic assistance of the lone pairs of the three nitrogen atoms. However, the fnU power of snch assistance in an enzyme would be counterproductive because it would overstabilize the cationic part of the catalytic cycle. Instead, the enzyme imposes a non-planar conformation where excessive stereoelectronic stabilization is avoided. This system illnstrates an interesting connection between geometry, reactivity and enzymatic fnnction. 

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