Figure 2

Concentration-dependent contractions to αβ-MeATP, UDPβS, UTPγS, ADPβS and ATPγS in (A) human cerebral arteries and (B) human omental arteries. UDPβS UTPγS, ADPβS and ATPγS were added after P2X receptor desensitisation with 10 μmol/L αβ-MeATP. Contractions are expressed as percentage of the response to 60 mmol/L K⁺. Data are shown as mean values ± S.E.M of 6 experiments (patients).