Fig. 6.
Average distances of immunogold particles from membranes. The values are the mean ± SEM of the distances of gold particles (white bars) or random points (black bars) located within a distance equal to 40 nm from different membrane categories, in the vicinity of glutamatergic synapses in rat hippocampus. Note that for both A1R (A) and P2Y1R (B) the mean distance of gold particles is shorter than that of random points in all membranes, except in mitochondria outer membranes (which represent background labelling). The total number of particles counted is for A1R gold particles 286, 241, 34, 159, 230, 38, 101, 37, 91, 241; for P2Y1R gold particles 392, 238, 41, 183, 247, 47, 145, 44, 207, 44; for A1 random points 457, 212, 46, 313, 218, 48, 187, 39, 149, 177; for P2Y1 random points 457, 127, 47, 270, 132, 55, 269, 60, 162, 63.