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Front cover illustration

The sporophore of Streptomyces sp. MSU-2110. This verticillated micro-organism is endophytic on Monstera sp., a vine that inhabits the rainforest of the upper Amazon region of Peru. The organism produces coronamycin, which has bioactivity against the malarial parasite as well as a number of plant-pathogenic fungi. The photograph was taken with the aid of an environmental scanning electron microscope and shows the spore masses attached to the verticels. Courtesy W. M. Hess, Brigham Young University, and G. Strobel, Montana State University, USA. See the paper by Ezra et al. on pp. 785-793.