A highly ordered structure in the frog epidermis.
D000818:Animals; D001001:Anura; D003461:Crystallography; D003594:Cytoplasmic Granules / Q000502:physiology; D004721:Endoplasmic Reticulum; D006056:Golgi Apparatus; D006652:Histological Techniques; D008854:Microscopy, Electron; D008928:Mitochondria; D011894:Rana pipiens; D012270:Ribosomes; D012867:Skin / Q000166:cytology*