User:Nikhil Malvankar/Cytochrome nanowires: Difference between revisions

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	====Histidine to Iron====		====Histidine to Iron====
	Each heme iron atom is coordinated by two histidine sidechain nitrogens, in addition to the four heme nitrogens. The iron of heme 5 (the next to last heme at the carboxy end of the chain) is bound to His 332 from its own chain, and '''His 16''' in the N-terminal "bulge" of the '''next protein chain''' in the filament. This inter-chain histidine-iron bond is undoubtedly important in strengthening the monomer-monomer interfaces in the filament. The histidines bound to hemes 1, 2, 3, 4, and 6 are all in the same protein chain that contains those hemes.		Each heme <scene name='83/835223/Histidine-iron/1'>iron atom is coordinated by two histidine sidechain nitrogens</scene>, in addition to the four heme nitrogens. The iron of heme 5 (the next to last heme at the carboxy end of the chain) is bound to His 332 from its own chain, and '''His 16''' in the N-terminal "bulge" of the '''next protein chain''' in the filament. This inter-chain histidine-iron bond is undoubtedly important in strengthening the monomer-monomer interfaces in the filament. The histidines bound to hemes 1, 2, 3, 4, and 6 are all in the same protein chain that contains those hemes.