Figure 5. . Amphioxus photoreceptors.

Figure 5.

Amphioxus photoreceptors. A, Amphioxus adult, schematic and image. Typical length 2-3 cm. B, Light-sensitive organs in the head region of the larval amphioxus. The frontal eye and lamellar body contain ciliary cells; the Joseph cells and pigmented dorsal ocelli are rhabdomeric. The notochord is shaded; m, mouth. From Lacalli (42). C, Molecular fingerprint of the frontal eye of larval amphioxus. The expression profile of vertebrate eye-specific regulatory genes (Rx, Otx, Pax4/6, Mitf) and eye-associated proteins (C-opsins, Gi, melanin) supports the homology of Row 1 cells with vertebrate photoreceptors, and of pigment cells with vertebrate RPE cells. From Vopalensky et al (47).

From: Evolution of Phototransduction, Vertebrate Photoreceptors and Retina

Cover of Webvision
Webvision: The Organization of the Retina and Visual System [Internet].
Kolb H, Fernandez E, Nelson R, editors.
Salt Lake City (UT): University of Utah Health Sciences Center; 1995-.

NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.