Allosteric Effects The conformational changes from the T to the R state is initiated by movement of the F-helix, which contains the proximal His movement of the proximal histidine towards the heme binding of oxygen to the heme reorganization of protein-protein contacts between the individual subunits movement of the F-helix, which contains the proximal His movement of the proximal histidine towards the heme binding of oxygen to the heme reorganization of protein-protein contacts between the individual subunits ANSWER DOWNLOAD EXAMIANS APP
Allosteric Effects The specificity of a ligand binding site on a protein is based on the opposite chirality of the binding ligand the presence of hydrating water molecules the absence of competing ligands the amino acid residues lining the binding site the opposite chirality of the binding ligand the presence of hydrating water molecules the absence of competing ligands the amino acid residues lining the binding site ANSWER DOWNLOAD EXAMIANS APP
Allosteric Effects An allosteric activator increases the binding affinity stabilizes the R state of the protein both (a) and (c) decreases the binding affinity increases the binding affinity stabilizes the R state of the protein both (a) and (c) decreases the binding affinity ANSWER DOWNLOAD EXAMIANS APP
Allosteric Effects The Hill coefficient (nH) for myoglobin and hemoglobin are respectively 2.8 and 1.0 1.2 and 4.5 4.5 and 1.2 1.0 and 2.8 2.8 and 1.0 1.2 and 4.5 4.5 and 1.2 1.0 and 2.8 ANSWER DOWNLOAD EXAMIANS APP
Allosteric Effects A protein that binds two ligands in a non-cooperative manner will show both (b) and (c) a linear Scatchard Plot a hyperbolic binding curve a sigmodial binding curve both (b) and (c) a linear Scatchard Plot a hyperbolic binding curve a sigmodial binding curve ANSWER DOWNLOAD EXAMIANS APP
Allosteric Effects Bisphosphoglycerate (BPG) cannot bind to the oxygenated R state of hemoglobin because it is displaced from the heme by movement of the proximal histidine it is displaced from the heme by oxygen BPG binds to the R state with the same affinity as the T state its binding pocket becomes too small to accommodate BPG it is displaced from the heme by movement of the proximal histidine it is displaced from the heme by oxygen BPG binds to the R state with the same affinity as the T state its binding pocket becomes too small to accommodate BPG ANSWER DOWNLOAD EXAMIANS APP
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