Fig. 1.

Import of Tom40 in skeletal muscle mitochondria of young and aged animals. Top: representative autoradiogram of Tom40 import in mitochondria isolated from skeletal muscle of young and aged animals. Lanes represent a 20-min time course of Tom40 import. Dashed lines indicate the lanes that have been realigned in a single gel. TL, 5 μl of translated product not incubated with mitochondria. Bottom: graphical representation of Tom40 import (n = 6). Data are expressed as arbitrary units (AU). *P < 0.05, main effect of time on protein import.