Figure 4From: Myogenic progenitors contribute to open but not closed fracture repair Endogenous osteoprogenitors do not express MyoD during tibial defect repair. Decalcified sections from drill hole defects (day 7 of repair) were stained for hAP+ cells. No MyoD-lineage cells were present within the defect (A, A') but were present within the tibialis anterior muscle (A).Back to article page