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Representative experimental traces of simultaneous force and intracellular [Ca2+] (expressed as F340/380) recordings, showing the control response superimposed on the response in the same IPA following 40 min incubation with 1 μmol/l SPC (panels A, B & D) or 100 nmol/l PdBu (panel C). In panels A, B & C constriction was elicited by PSS containing 23 mmol/l [K+], and in panel D by the TP agonist U-46619 (20 nmol/l) in the presence of diltiazem (10 μmol/l).
