Table 1.

Percentage of PDE9A-expressing cells in retina (averages of 3 retinas).

	GCL	INL
No. of X-gal-stained cells/206,000 μm2	495	219
No. of GABA-stained cells	325	509
% of X-gal cells that use GABA	20%	27%
% of GABA cells that expresses X-gal	20%	7%