Figure 6: Expressions of cTnI and phosphorylated cTnI at Ser23/24 in the myocardium after the pacing and ISO treatment. (a) The representative Western blots of cTnI and phosphorylated cTnI at Ser23/24. (b) Expression of total cTnI which is the sum of cTnI and NH2-terminal deleted fragment of cTnI (cTnI-ND). (c) The phosphorylation of cTnI. Data are mean ± SEM, hearts in each group. * or ** versus baseline.