Posted: Oct 10, 2018 1:40 am
Rumraket wrote:
Did you even read your own link?One photon.An integration of biochemical experiments in vitro with electrophysiological recordings from intact rod photoreceptors indicates that the total number of G protein molecules activated in the course of a light response to a single photon is ~16 in the mouse and ~60 in the frog. This further translates into hydrolysis of ~2000 and ~72 000 molecules of cGMP downstream of G protein, respectively, which represents the total degree of biochemical amplification in the phototransduction cascade.
Yes, one photon....the signal produced from which has been MASSIVELY AMPLIFIED. Were this not the case, the signal would be useless.