About the Cover
Cover picture: An early stage of the antibody response to DNP protein in rat spleen Blue stains the cells that bind the DNP antigen, red stains proliferating cells tlaat incorporate bromodeoxyuridine and brown stains T cells tlaat surround a central artery in the white pulp. On the right side of the picture, dark blue antibody-secreting cells are numerous in the outer part of T cell area, or periarteriolar sheath. On the left part of the picture, cell proliferation (red) arid many antigen binding B cells (blue) are prominent in the B cell area or follicle. See commentary in this issue by Liu, pp. 625-629, and related article by Cook et al., pp. 631-643.
pp. 625-629.
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