Contents

04 December 1992
Vol 258, Issue 5088

About The Cover

The lamina propria of the rat duodenum, showing immune cells that unexpectedly express targets for antiulcer drugs. Plasmocytes that produce immunoglobulin G are shown in green, and cells that express M1 acetylcholine receptors are red; scattered immunoglobulin G-producing cells that also express M1 acetycholine receptors are shown in yellow. See page 1662 and the News report on page 1579. [Photo: Ricardo Dreyfuss]