Table 2. Summary of quantitative parameters determined for mouse discs.

Calculated parameter	WT	Rho+/-
Disc surface area (both lamellae)	3.53 µm2	1.80 µm2
Rhodopsin molecules per disc	75,000	38,200
Peripherin-2+ROM1 molecules per disc	5,910	6,360
Total rim length	6.21 µm	N/A*
Measured incisure length as % of disc diameter	50%†	N/A*
Theoretical incisure length as % of disc diameter	-	155%

^*Incisure and total rim lengths in Rho +/- discs cannot be readily measured due to incisure complexity.

^†The value is taken from the measurements shown in Figure 6.