Fig. 5: Real-time measurement shows the change in contractility of the cultured cardiomyocytes.

a Normalized cantilever displacement owing to the contraction and relaxation of the cultured cardiomyocytes. b, c Relative contraction force, and beating rate of the cardiomyocytes at different maturation days. Error bars are mean ± s.d., n = 5 biologically independent samples.