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The two symbionts, Sulcia (red) and Baumannia (green) from the sharpshooter Graphocephala atropunctata. The cells are visualized by using fluorescent in situ hybridization with probes for taxon-specific 16S rRNA sequences (61). The large Sulcia cells are sometimes closely surrounded with Baumannia cells. (Photo by P. Tran and N. Moran, University of Arizona.)
