With the use of site-directed mutagenesis, hemoglobin has been prepared in which the proximal histidine residues in both alpha and the beta subunits have been replaced by glycine. The imidazole ring from the histidine residue can be replaced by adding free imidazole in solution. a) Would you expect this modified Hb with free imidazole to exhibit oxygen binding? Why or why not? b)Would you expect this modified hemoglobin to show cooperativity in oxygen binding? Why or why not?