Figure 9. Effects of ATPγS and α,β-methylene ATP on resting [Ca²⁺]_i and the thapsigargin-evoked [Ca²⁺]_i increase.

Periods of exposure to 1 μm noradrenaline (NA), 100 nm thapsigargin (TG), 10 μm ATPγS, and 10 μmα,β-methylene ATP (αβ-meATP) are indicated by horizontal bars below chart records of [Ca²⁺]_i. The effects of ATPγS (A) and α,β-methylene ATP (B) on resting [Ca²⁺]_i and the thapsigargin-induced [Ca²⁺]_i increase were examined, as indicated. Each trace was obtained from different cells and is representative of 6 cells.