Examples of double-labeled condyles from rapidly (A,C) and slowly (B,D) growing animals at D24. The distracted side (A,B) is compared with the undistracted side (C,D). Note that both calcein (line with end dots) and alizarin (double-headed arrow) bands are narrower in the distracted than the undistracted sides. This side difference occurred at all time-points in rapidly growing rats, but only at D24 in slowly growing rats. The stars denote autofluorescence of unmineralized tissue.