Fig. 1.

Retinal distribution of SRIF and somatostatin sst_2A immunoreactivity. a, A SRIF-immunoreactive amacrine cell body whose processes extend into both distal and proximal portions of the IPL. b,sst_2A receptor immunoreactivity that is located in both plexiform layers. Arrows indicate positive staining of photoreceptor bases. c, Absence of sst_2Aimmunoreactivity when antibody was preabsorbed with a blocking peptide.Labels indicate retinal layers: gcl, ganglion cell layer; inl, inner nuclear layer;ipl, inner plexiform layer; opl, outer plexiform layer; and pl, photoreceptor layer. Scale bar:a–c, 5 μm.