Single Photon Response for Rods in a Toad's Eye

response amplitude vs. time in sec.

initial concentration in μM

cGMP

5

compartment size:% of outer segment volume

%

5

This Demonstration treats the single photon response of a rod in a toad's eye. First, choose the dark cyclic guanosine monophosphate (cGMP) concentration with the first slider. Then choose the volume of the compartment with the second slider to best fit the experimental data. The red dots give some experimental data. Note how sensitive the fit is to the volume of the compartment.