Opsin immunocytochemical characterization of different types of photoreceptors in the frog pineal organ.

Abstract excerpt

The pineal organ of the frog, Rana esculenta and R. temporaria, was studied by opsin immunocytochemistry using two polyclonal antibovine rhodopsin and the monoclonal antichicken opsin antibodies OS-2 (detecting blue and green pigments) and COS-1 (detecting green and red pigments). Four types of photoreceptor cells were distinguished. The large outer segments of the numerous electron-dense photoreceptor cells...

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