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For questions related to the molecular structure of biological macromolecules (especially proteins and nucleic acids), how they acquire the structures they have, and how alterations in their structures affect their function.

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The $\ce{Fe^{II}}$ ion is held in the centre of the heme's porphyrin ring and is also attached to a nitrogen atom on a nearly histidine group which is part of the protein. When there is no oxygen pres …
answered May 16 '18 by porphyrin
3
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Yes it is true that protein folding takes a long time compared to bond vibrations (few femtosecond) or rotations of a amino acid (picoseconds to nanoseconds) and for small proteins can take of the ord …
answered Jun 17 '16 by porphyrin