Allosteric Effects The conformational changes from the T to the R state is initiated by movement of the proximal histidine towards the heme binding of oxygen to the heme movement of the F-helix, which contains the proximal His reorganization of protein-protein contacts between the individual subunits movement of the proximal histidine towards the heme binding of oxygen to the heme movement of the F-helix, which contains the proximal His reorganization of protein-protein contacts between the individual subunits ANSWER DOWNLOAD EXAMIANS APP
Allosteric Effects Bisphosphoglycerate (BPG) cannot bind to the oxygenated R state of hemoglobin because BPG binds to the R state with the same affinity as the T state it is displaced from the heme by movement of the proximal histidine it is displaced from the heme by oxygen its binding pocket becomes too small to accommodate BPG BPG binds to the R state with the same affinity as the T state it is displaced from the heme by movement of the proximal histidine it is displaced from the heme by oxygen its binding pocket becomes too small to accommodate BPG ANSWER DOWNLOAD EXAMIANS APP
Allosteric Effects In hemoglobin, allosteric effects occur only in humans to maximize oxygen delivery to the tissues for maintaining Fe in the Fe2+ state to minimize oxygen delivery to the tissues only in humans to maximize oxygen delivery to the tissues for maintaining Fe in the Fe2+ state to minimize oxygen delivery to the tissues ANSWER DOWNLOAD EXAMIANS APP
Allosteric Effects Small molecules affect hemoglobin (Hb) by increasing [H+] increasing [H+] and decreasing Hb affinity for O2 increasing Hb affinity for O2 decreasing Hb affinity for O2 increasing [H+] increasing [H+] and decreasing Hb affinity for O2 increasing Hb affinity for O2 decreasing Hb affinity for O2 ANSWER DOWNLOAD EXAMIANS APP
Allosteric Effects O2 binding to hemoglobin results in extensive protein conformational change both (a) and (b) 100-fold higher affinity for the last O2 bound than for the first 100-fold lower affinity for the last O2 bound than for the first extensive protein conformational change both (a) and (b) 100-fold higher affinity for the last O2 bound than for the first 100-fold lower affinity for the last O2 bound than for the first ANSWER DOWNLOAD EXAMIANS APP
Allosteric Effects The Hill coefficient (nH) for myoglobin and hemoglobin are respectively 1.2 and 4.5 1.0 and 2.8 2.8 and 1.0 4.5 and 1.2 1.2 and 4.5 1.0 and 2.8 2.8 and 1.0 4.5 and 1.2 ANSWER DOWNLOAD EXAMIANS APP
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