Fig. 2.

A: rat preglomerular vascular smooth muscle cells were incubated with adenosine (3 μmol/l) for 1 h in the absence or presence of guanosine (30 μmol/l) and either without or with 8-aminoguanosine (8-AG; 30 μmol/l; purine nucleoside phosphorylase inhibitor). B: rat preglomerular vascular smooth muscle cells were incubated with adenosine (3 μmol/l) for 1 h in the absence or presence of guanine (30 μmol/l). For A and B, the medium was assayed for adenosine by mass spectrometry. Values represent means ± SE.