Increasing the dose of total body radiation does not increase marrow-to-muscle conversion. One month after transplantation of GFP-positive marrow cells and cardiotoxin injury of tibialis anterior muscle, the percentage of GFP-positive muscle fibers was evaluated. (A-B) Each bar shows average ± standard error from 5 to 6 animals from 2 separate experiments. (B) The percentage of GFP-positive muscle fibers were corrected for muscle weight (see “Materials and methods”).