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Fig. S4
The peak in S phase occurs at different times of the day in different zebrafish tissues. Representative cross-sections of larval brain (A) and intestine (B) immunostained for BrdU. DAPI was used as a nuclear counterstaining. Images corresponding to peak and trough times are shown for both tissues. Insets show higher magnification of the boxed areas. Arrows indicate examples of BrdU-positive cells (punctate nuclear staining). Asterisks indicate nonspecific staining. (Scale bar, 50 μm.)
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