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TGF-β2 had no effect on resting membrane potential or EPP time course but slightly increased muscle fiber input resistance. (A–C) TGF-β2 (1 ng/mL) had no significant effect on EPP rise time (A), time to return to 50% of peak (B), or resting membrane potential (C). (D and E) Two-electrode recording revealed a small increase in muscle fiber input resistance with bath application of TGF-β2 (dark blue trace) relative to control (black trace). *1P < 0.02.
