title: The isolation of the green rod pigment of the frog, Rana catesbeiana.
mesh_terms: D000818:Animals; D002942:Circular Dichroism; D010786:Photoreceptor Cells / Q000032:analysis*; D011892:Rana catesbeiana / Q000033:anatomy & histology*; D012168:Retinal Pigments / Q000302:isolation & purification*; D012374:Rod Cell Outer Segment / Q000032:analysis*; D013057:Spectrum Analysis
chemical_list: D012168:Retinal Pigments