Camels have three different sub-classes of IgG ( IgG 1, IgG 2 and IgG 3) , of which IgG2 and IgG3 are structurally different from the human IgG. A researcher purified camel IgG1 and IgG3, and carried out gel electrophoresis that separates polypeptides based on their molecular size. An IgG antibody purified from human serum is electrophoresed on the same gel. A schematic of the observed band pattern on the gel is show