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Fife is an active zone protein. A, In situ hybridization detects fife RNA in postmitotic neurons of stage 17 embryos. B, Single optical section (0.1 μm) of C155-Gal4/Y; UAS-Venus-fife/+ NMJ boutons colabeled with antibodies to GFP and Bruchpilot. Scale bar, 5 μm.
