Abstract

Abstract Proteins and enzymes with non‐haem iron centres display many functions: metal centres with primarily sulfur ligation are involved in electron transfer, electrophilic activation of hydroxyl groups, regulation of gene expression and fixation of N 2 ; mononuclear and diiron centres with oxygen and nitrogen ligation have roles in various reactions with O 2 and in hydrolysis. The principles of their mechanisms of action are beginning to emerge from the considerable experimental data obtained on these proteins. Future research will attempt to manipulate the enzymes to extend their already substantial catalytic capabilities.

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