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Influence of the pillar stiffness on dynamic and static contractility of CMTs constructed in 0.5 mg/mL fibrin and 1.0 mg/mL collagen gels. (A) Average tension, (B) cross-sectional area, and (C) cross-sectional stress for CMTs tethered to flexible (k=0.20 μN/μm) or rigid (k=0.45 μN/μm) cantilevers at day 5. Data are the average of 15 CMTs±SEM. (D) Corresponding phase-contrast images. *p<0.01; **p<0.01.
