opsins

Then it's ready to be attached to a group of proteins called opsins, and used by color and black and white photo receptors.

Boing Boing 2009

Vertebrate retinas have two groups of light-sensitive proteins called opsins: those in rod photoreceptors, which are sensitive to dim light, and those in cone photoreceptors, which are sensitive to color.

ScienceBlogs Channel : Life Science 2009

Mutations in the genes for light-detecting proteins called opsins explain why,

Planet Atheism 2008

Then it's ready to be attached to a group of proteins called opsins, and used by color and black and white photo receptors.

Science Question From a Toddler: What do blind people see? Boing Boing 2009

Many others have been thoroughly tested, and also examined biochemically for color opsins.

More creationist misconceptions about the eye - The Panda's Thumb 2010

They have opsins that they use for both light detection (sensory rhodopsin-I and sensory rhodopsin-II) *and* photosynthesis without chlorophyll (bacteriorhodopsin and halorhodopsin).

Halobacterium salinarum - The Panda's Thumb 2009

The evolution of the mammalian camera eye seems at first glance to non-biologists to be highly improbable, but we know that the camera eye lies at the end of a series of increasingly sophisticated part-eyes, from the simple concentration of photosensitive opsins in the tentacles of Sea Urchins, to simple pigment cups, to pinhole eyes and so on see Arendt, 2003, Gehring 2004, Nilsson 2004 for example.

Blind Mice vs Behe; the Evolution of Vision - The Panda's Thumb 2006

In amongst the wealth of data were new clues to the evolution of the immune system, and the discovery that Sea Urchins express both rhabdomyeric and cilliary opsins, without having specialised eyes, gives us new clues to the evolution of the eye.

Blind Mice vs Behe; the Evolution of Vision - The Panda's Thumb 2006

In modern opsins, the central ion-conducting pore is retained, but no-longer conducts ions.

Blind Mice vs Behe; the Evolution of Vision - The Panda's Thumb 2006

Proteins of the invertebrate and vertebrate phototransduction system, Taken from Arndt 2003. r and g; Rhabdomeric and Cilliary opsins.

Blind Mice vs Behe; the Evolution of Vision - The Panda's Thumb 2006