dslc1000 Posted October 26, 2003 Posted October 26, 2003 I have a few specific questions: (i) How many photopigments are then in a typical rod and a typical cone? (ii) Does the number vary? If so, in what range?
fafalone Posted October 27, 2003 Posted October 27, 2003 There are 3 in cones. Red, green, and blue opsins, which are all types of rhodopsins. There is only 1 kind in rods. The numbers of kinds of pigments does not vary from cell to cell, however the concentration of cones is localized to the fovea.
dslc1000 Posted October 27, 2003 Author Posted October 27, 2003 Thanks fafalone, but I'm not sure that's the information I was looking for. What I meant to ask was 'how many actual rhodopsin molecules are there per photoreceptor, i.e. embedded in the discs of the photoreceptor outer segments?' Are you saying that there are only three in cones, and one in rods?
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now