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Optic nerves labeled with DiI appear normal. Whole mount views of the base of brain of wild-type (Upper) and Gαo−/− littermate (Lower) in the region of the optic chain. The brains were fixed and labeled at embryonic day 15 and examined 7 days later. No difference was noted with embryonic day 15 labeling or for animals labeled the day of birth (data not shown).
