Measurement of the vitamin A cycle.
D000818:Animals; D002845:Chromatography / Q000379:methods; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D003124:Colorimetry / Q000379:methods; D003624:Darkness; D008027:Light; D012160:Retina / Q000378:metabolism*; D012168:Retinal Pigments / Q000378:metabolism; D014212:Tretinoin / Q000378:metabolism; D014801:Vitamin A / Q000378:metabolism*
D012168:Retinal Pigments; D014801:Vitamin A; D014212:Tretinoin