... © 1998 by Company of Biologists 1998 Correct fits of the experimental data, for SLs far exceeding those found in vivo (range for psoas muscle, 2.2-3.2 µm; Goulding et al., 1997 ), were obtained with the entropic elasticity model according to Eq. 1 ( Fig. 7 ). Thus, the N-terminal poly-Ig...