Electron micrographs showing the attachment and endocytosis of the iccosome at day 3 of the response. In A, an ICCOSOME, [Immune Complex COated SOME (=body)] is delivering antigen for edocytosis and processing and it is shown attached via the black HRP-anti HRP globules on its surface to a germinal center B lymphocyte . In B, an iccosome is being endocytosed (arrow) by a germinal center B cell.