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Oxygen binding changes everything

When the iron binds an oxygen molecule, it triggers a series of adjustments. The iron's favorite bond angles change, flattening the heme and 'pulling' on that histidine we've been watching. This in turn triggers a number of shifts as some parts of the molecule are forced out of the way of the heme, or are forced to move by virtue of their attachment to one of two key histidines.

O2 and heme

with histidines pre-set view
with histidines maintain current view

add helices histidines + the helices that house them

everything ribbons view

everything wireframe view

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