Haemoglobin, Myoglobin, Buffering systems
Quiz yourself by thinking what should be in
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| State the Henderson Hasselbalch equation | show 🗑
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| show | Porphyrin molecule to which an iron atom (Fe2+) is coordinated; the porphyrin ring is a complex C-N structure
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| show | Attached to the globin chain through proximal histidine residue prevents oxidation of iron to higher oxidation states
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| Why is haem protected by the globin polypeptide? | show 🗑
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| How does O2 binding change the shape of haemoglobin? | show 🗑
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| show | Heme is domed: iron atom in the center is drawn out of the plane
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| show | Binding of O2 causes conformational changes which lead to breakage of some of the non-covalent interactions between subunits
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| show | Each subunit of Hb binds O2 independently, the binding of O2 at one subunit influences the binding of O2 at other subunits
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| show | Binds in the cleft between subunits only present in the T-state
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| Describe the oxygen binding characteristics of myoglobin | show 🗑
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| show | Haemoglobin is a tetramer with only one histidine residue involved when oxygen binds to haem. There are four haemoglobin molecules
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