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Figure 5 | Cell Communication and Signaling

Figure 5

From: Apical membrane P2Y4 purinergic receptor controls K+ secretion by strial marginal cell epithelium

Figure 5

Changes of intracellular Ca2+ concentration ([Ca2+]) of marginal cell layer in response to three consecutive perfusions of UTP (10 μM; 30 s). Top: Time control, no additional treatments (n = 7); middle: second exposure to UTP in the presence of the IP3 receptor inhibitor 2-APB (n = 9); bottom: second exposure to UTP in the absence of bath Ca2+ (n = 7). Vertical bars are SEM (not all shown; spaced for clarity).

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