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Absence of ChAT in embryonic mouse ovary and morphology of ChAT (-/-) mouse ovary. A: ChAT is not detectable using immunohistochemical methods in a mouse ovary at day 18 p.c. Bar = 50 μm. B-C: H.E. stained sections of the ovary of an embryonic (day 18 p.c.) age-matched wild-type ovary (+/+) and a mutant mouse null for ChAT (-/-). Bars = 60 μm.
