Look up: transducin

1. transducin
   A GTP-binding protein found in the disc membrane of retinal rods and cones: of the part of the cascade involved in transduction of light to a nervous impulse. A complex of three subunits; a (39 kD), b (36 kD) and g (8 kD). Photoexcited rhodopsin interacts with transducin and promotes the exchange of GTP for GDP on the a subunit. The GTP- a subunit dissociates from the complex and activates a cGMP-phosphodiesterase by removing an inhibitory subunit. The a subunit of transducin can be ADP-ribosylated by cholera toxin and pertussis toxin.
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
2. transducin
   <protein> A GTP-binding protein found in the disc membrane of retinal rods and cones: of the part of the cascade involved in transduction of light to a nervous impulse. ... A complex of three subunits, alpha (39 kD), beta (36 kD) and gamma (8 kD). Photoexcited rhodopsin interacts with transduc...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
3. transducin
   (trans-doo´sin) a of the retinal rods that interacts with activated rhodopsin as part of the process of triggering a nerve impulse in vision.
   Found on http://www.encyclo.co.uk/local/21001
   
   
4. transducin
   (from the article `rod`) ...isomerization (a change in configuration), forming all-trans-retinaldehyde. This isomerization activates the opsin protein, which then interacts ...
   Found on http://www.britannica.com/eb/a-z/t/71
   
   
5. transducin
   Type: Term Pronunciation: tranz-dū′sin Definitions: 1. A protein that binds guanine nucleotides (a G protein), found in retinal rods and cones, that plays a major role in signal transduction; in vertebrate rod cells it acts as a link of the photolysis of rhodopsin to the activation of cGMP phosphodiesterase.
   Found on http://www.medilexicon.com/medicaldictio
   
   
6. Transducin
   II (rainbow colored) embedded in a lipid bilayer (heads red and tails blue) with Transducin below it. G_tα is colored red, G_tβ blue, and G_tγ yellow. There is a bound GDP molecule in the G_tα-subunit and a bound retinal (bl...
   Found on http://en.wikipedia.org/wiki/Transducin