Evolution of human colour vision as 'visual purple' receptor proteins, are encoded by Rh1, OPN2 and RHO genes. They are characterized by extreme sensitivity to light and enable monochromatic human vision in low light or dim conditions. They are broken down into retinal and opsin when exposed to these conditions. Humans have 3 types of photopsin proteins found in the cone cells. Long Wavelength Sensitive Opsin (Red cone opsin) – Encoded by the OPN1LW gene with a λmax of 560 that is found in the yellow-green electromagnetic spectrum despite its name. Its sensitivity to the colour red is still known to be higher than the
The Needle's Eye (novel) The Needle's Eye (novel) The Needle's Eye is a 1972 novel by British novelist Margaret Drabble. The novel was well received by reviewers, like contemporary novelist Joyce Carol Oates. Though it was her fifth novel, Drabble described it as her first time that she could "actually write a novel" expressing what she wanted to write. Novelist Joyce Carol Oates gave a glowing review for the novel in the "New York Times" describing the novel as well surpassing the quality of her earlier works. Oates writes that "The Needle's Eye" was an "extraordinary work", transporting the reader into the "human and