Well, a process known as cell mediated endocytosis begins to take place. And what this process does is it invaginates our cell membrane and it forms this vesicle that is brought into the cytoplasm of our cell as shown in this diagram. So the antigen shown in red binds onto the cell receptor of the B cell and then that initiates the cell mediated endocytosis process and that ultimately forms that internal vesicle. And now the antigen is found inside this vesicle of arocytoplasm. Now the cell also has lysosomes and these lysosomes are shown in green and they confuse with this vesicle. And these lysosomes release digestive enzymes that can proteolytically break down our antigen.