TABLE 1.

YFP-Rem inhibits EC coupling

	ΔF/F-V			Contracting cells/ number tested
	ΔF/Fmax (ΔF/F)	VF (mV)	kF (mV)
Normal	0.46 ± 0.08 (9)	6.9 ± 1.2	6.4 ± 0.5	60/68
Normal + YFP-Rem	0.14 (8)	8.4	6.8	7/16
Normal + YFP	0.63 ± 0.25 (4)	4.3 ± 0.9	6.5 ± 0.3	8/10

ΔF/F-V relationships were fitted using Eq. 1. For untransfected normal myotubes and myotubes expressing YFP, data represent the average of the fits for each individual experiment (numbers in parentheses represent the number of myotubes tested) and are given as mean ± SE. Because seven of eight experiments with myotubes expressing YFP-Rem were difficult to fit with Eq. 1, the ΔF/F-V relationship is given as the fit of the average data.