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INTRODUCTION. On close investigation of the ’P cluster’ of nitrogenase, which is known to consist of Fe_4S_4~(2+) core, scientists have considered that the collective properties are highly suggestive of those being variants of analogue Fe_4S_4~(2+) clusters. Attention has been directed recently to the possibility that ’P cluster’ variations may include some or all Fe atoms that are not 4-coordinated as in usual Fe-S analogues but are 5-coordinated.
INTRODUCTION. On close investigation of the ’P cluster’ of nitrogenase, which is known to consist of Fe 4 S 4 - (2+) core, scientists have considered that the collective properties are highly suggestive of those being variants of analogue Fe 4 S 4 - clusters. Attention has been directed recently to the possible that ’P cluster’ variations may include some or all Fe atoms that are not 4-coordinated as usual Fe-S analogues but are 5-coordinated.