Fig. 3. Relaxation dynamics of normal and SG-deficient myotubes.(A) Length relaxation, or self-peeling, occurred when one end of the cell was mechanically detached with a micropipette at t=0. (B) Data for 6-day-old C57 (15 cells) and SG^–/– (10 cells) were binned by time, averaged, and fit by L/L_init = 1 – A (1 – e^–t/) with the indicated R² values. Based on the fit of the binned data, A_C57=0.16 and A_SG=0.31. Error bars represent the s.e. of the binned means. Although SG^–/– cells relaxed faster and to a greater extent than C57 cells, SG^–/– cells showed more heterogeneity.