Fig. 1From: Functional characterization of four opsins and two G alpha subtypes co-expressed in the molluscan rhabdomeric photoreceptorImmunohistochemical staining of opsin proteins. Serially sectioned superior tentacles (10 μm thick) were stained with specific antibodies. Below is a cartoon explaining the anatomy of the superior tentacle. Scale bar: 200 μm. A, anterior; P, posterior; D, dorsal; V, ventral. AR, accessory retina; PL, pigment layer; TG, tentacular ganglion; TN, tentacular nerve; ON, optic nerve; BF, bright-field imageBack to article page