So these plasma cells have very extensive endoplasmic reticulum as seen in the following diagram. And that's because these plasma cells, their function is to basically form antibody. So remember, the plasma cells and the memory B cells are part of the humoral immunity, they're part of the antibody mediated immunity. And what that means is they're involved with forming and storing antibodies. So the plasma cells form antibodies that are complementary to these specific antigens that we spoke about earlier shown in red. So these antibodies are complementary to the antigens found on this bacterial cell.