Basically these receptors sense darkness rather than light. Light changes the conformation of the proteins so it shuts down ion flow out of the visual nerve cells.
On Tuesday, September 2, 2014 11:01:04 AM UTC+2, Mega [Andreas Stuermer] wrote:
-- So no downstream signaling proteins to consider?
Wikipedia says the colour-sensing proteins actually are G-coupled proteins...So there will be downstream proteins...
http://de.wikipedia.org/wiki/Iodopsin
On Tuesday, September 2, 2014 11:01:04 AM UTC+2, Mega [Andreas Stuermer] wrote:
Exacty. I'd just take the same promoter from the normal green light receptors.
The green light receptor originated by duplication of the red receptor (or was it the other way round?). They are very close together, so they can recombine and thus the inability to make a distinction between red and green light is caused.
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