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Contractile responses evoked by KCa channel blockers in SHR MA at resting tension. (a) Concentration–contraction response curve for TEA; (b) contraction to iberiotoxin and to charybdotoxin in SHR and WKY mesenteric arteries. Results (mean±s.e.) were from four to 12 rats. *P<0.05, **P<0.01 compared with WKY.
