41. The regeneration of active rhodopsin requires opsin and 11-" cis "-retinal. 42. An opsin is arranged into a bundle of seven transmembrane alpha-helices connected by six loops. 43. One of these copies evolved to be sensitive to green light and constitutes our mid wavelength opsin . 44. The Go / RGR opsins consist of four groups : The Go-opsins, the neuropsins. 45. The Go / RGR opsins consist of four groups : The Go-opsins , the neuropsins. 46. For tritanopia, the S-opsin gene must be introduced instead of M-opsin gene. 47. For tritanopia, the S-opsin gene must be introduced instead of M-opsin gene. 48. Many New World monkeys have only two opsins , the visual pigments sensitive to particular colors of light. 49. The remaining opsin ( melanopsin ) is found in photosensitive ganglion cells and absorbs blue light most strongly. 50. Ciliary opsins , found in vertebrates and cnidarians, attach to ciliary structures such as rods and cones.
