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Slow gradual occupancy of the short promoter elements during chondrogenesis. Shown is a comparison of in vivo footprints formed with DMS in the vicinity of the Ine (A) and Pe1 elements (C) in CEC and in day 0, 2, and 4 HDM cultures. (B and D) Summary of in vivo footprinting on both strands. Other symbols are as in Fig. 4.
