Table 1.

Number of breaks in the ONL of Chick Retinas Infected with RCAS Expressing Various En Constructs

Construct	Breaks (n)	Sections (n)	Breaks per Section (n)	Embryos* (n)	Viral Infection (%)	Breaks per Section† (n)
En-NeuroDΔC	996	55	18.11	9	20	90.55
En	1	44	0.02	6	60	0.03
En-cNSCL1	11	22	0.50	3	70	0.71
En-cNSCL2	2	48	0.04	6	80	0.05

Data were collected from E9–E18 chick embryos with the virus microinjected into the subretinal space at E2. Retinal cross sections were cut through or adjacent to the meridional plane.

^*Number of embryos, each with 5 to 8 retinal cross sections counted. Viral infection was the percentage of retinal cells staining positive for p27 and is shown as the average of n retinas.

^†Normalized for 100% viral infection.