CB13 (1-naphthalenyl [4-(pentyloxy)-1-naphthalenyl]methanone) was from Cayman Chemical (Ann Arbor, Michigan). Tyrode’s buffer was supplemented with vehicle (0.1% v/v DMSO) or CB13 (1 μM, 0.1% v/v DMSO). Treatments remained in buffer for the remainder of the experiment. The concentration of CB13 was based on our previous findings in cardiomyocytes in vitro (Lu et al., 2014 (link); Lu et al., 2020 (link)).
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