Synergistic Effects between Phosphorylation of Phospholamban and Troponin I Promote Relaxation at Higher Heart Rate

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, 𝑛=6 hearts in each group. *𝑃<0.05 or **𝑃<0.01  versus baseline.

(a)

(b)

(c)