JCS -- Bootman et al. 114 (12): 2213 Figure IG3

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Fig. 3. Triggering Ca²⁺ sparks by T-type VOCCs or Ins(1,4,5)P₃Rs. This figure illustrates the activation of spontaneous Ca²⁺ sparks by T-type VOCCs in primary cardiac pacemaker cells and Ins(1,4,5)P₃Rs in atrial cells. RyRs and Ins(1,4,5)P₃Rs are coloured orange and blue, respectively. The Na⁺/Ca²⁺ exchanger is green.