And basically that macrophage can break down that pathogenic agent. So earlier we said there are five different classes of immunoglobulins. We have immunoglobulin D, immunoglobulin A, immunoglobulin M g, as well as E. So the major difference between these five different types of classes of antibodies is the sequence of amino acids in these constant regions. And each one of these different classes of antibodies functions in its own way to basically defend our body from these pathogenic invasions. So let's very quickly look at some major distinctions between these five classes. So let's begin with IgG immunoglobulin g. So immunoglobulin g is actually the most common type of antibody that is found inside our blood.