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The chicken pineal gland possesses the capacity to generate circadian oscillations, is able to synchronize to external light:dark cycles and can generate an hormonal output — melatonin. We examined the light responses of the chicken pineal gland and its effects on melatonin and Per2, Bmal1 and E4bp4 expression in 19-day old embryos and hatchlings during the dark phase, subjective light phase and in...
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