Look at the alignments of hemoglobin and myoglobin below. Based on that information, which of the following statements is true ?
a. Perfectly conserved residues are always present in helices, not in loops or other irregular secondary structures
b. The fact that only one residue is conserved in helix G, yet both proteins have a helix at that position, illustrates the idea that structure is more conserved than sequence
c. An analysis of the primary structure alone is insufficient to determine whether the structures of two proteins are substantially similar
d. The conserved WGKV in helix A illustrates the idea that structure is more conserved that sequence
e. The deletion in hemoglobin α means that it is not possible for the secondary structure to be conserved in that region