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13 Cards in this Set
- Front
- Back
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Which protein functions to facilitate diffusion of oxygen through cells to mitochondria where it is consumed?
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Myoglobin
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non-polypeptide portions of proteins necessary for activity
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Prosthetic Group
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is a porphyrin with iron at its center
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heme
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The type of porphyrin found in hemoglobin and myoglobin
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Protoporphyrin IX
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Which state must heme iron be in to bind oxygen?
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Fe2+
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Structure has 153 amino acids which assumes a compact globular shape
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Myoglobin
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Proximal Histidine
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HisF8
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Distal Histidine
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HisE7
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Which residue in myoglobin forms a bond with heme iron
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His F8, proximal histidine
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Which residue in myoglobin forms a bond with oxygen?
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His E7, distal histidine
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indicates whether the binding of one ligand influences the binding of another
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cooperativity
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Hb exhibits ________ cooperativity.
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Positive
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Changes in residues on the _______ surface of the hemoglobin molecule rarely affect function or have pathological effects.
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Outer
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