Fig. 2.

Axotomy increases Schwann cell apoptosis during early development. The distal nerve stumps of sciatic nerves that were transected at P0, P5, and P20 (cross-hatched bars), and age-matched unlesioned nerves (solid bars) were removed and processed for detection of apoptosis by the TUNEL assay. The data represent the mean percentage of apoptotic cells in 10 representative fields from three to four sections of each nerve. Error bars represent SEM.