Talk:Photoreceptor cell
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| /July 2006, /July 2006 talk |
Contents |
[edit] Proposed merge
The proposed merge with Photoreceptor cell is being discussed at Talk:Photoreceptor cell#Merge.--Srleffler 04:27, 27 June 2006 (UTC)
[edit] Signal transduction pathway
I think "signal transduction pathway" would be easier to read if each number did not rephrase in parenthesis what it just stated.—The preceding unsigned comment was added by Tjerman (talk • contribs) 10:25, 14 September 2006 (UTC).
- There was recently a merge with another article that contained virtually the same information. This section still needs to be cleaned-up. Feel free to lend a hand if you have the time! -AED 15:52, 14 September 2006 (UTC)
[edit] More than 2 types of photoreceptors in humans!
Hi,
There are more than 2 types (rods and cones) of photoreceptors in humans. The 3rd is the photoreceptive ganglion cells in the Ganglion Cell layer. See any Foster paper from 2003.
Thanks I've just finished the reading for my clocks essay and it's quite rewarding to correct everybody who, evidently hasn't!
- ) —The preceding unsigned comment was added by 144.82.106.47 (talk) 19:11, 11 January 2007 (UTC).
[edit] Invertebrate Photoreceptors
Not sure if this is the right place, but the lack of an invertebrate photoreceptor article detailing the differences indicated in this article seems...not very good? Unfortunately I don't have any expertise in this area--maybe the mention of a few references or external links would be enough to rectify the omission. I came here looking for some information on the operation of eyespots in freshwater planaria, and seem to have encountered a dead end.
128.189.240.255 06:05, 15 February 2007 (UTC)
[edit] Disambiguation needed?
As a molecular biologist, the way I think about photoreceptors is in a molecular sense, e.g. rhodopsin, phytochrome, and cryptochrome, and not as cells. I think this page would need to be disambiguated for that meaning or expanded by a section on the molecular meaning of photoreceptor. Some plant photoreceptors, e.g. phototropin, actually link here which makes no sense at all since plants don't have neurons or a retina. I can see how "photoreceptor" seemed to be a simpler term than "photoreceptor cell", but it is also ambiguous for photoreceptor molecules (which exist in many organisms all the way from bacteria to plants) and the page currently doesn't reflect that. - tameeria 16:15, 5 March 2007 (UTC)
I found that besides "photoreceptor protein" or "photoreceptor molecule", some pages also use the term meaning "photoreceptor organ" (e.g. ocellus, eyespot). So with three distinct biological meanings (molecular, cellular, organ), I think there really needs to be some sort of disambiguation here. Incidentally, redirecting photoreceptors, microbial here makes as little sense as redirecting the plant photoreceptors to this page. - tameeria 00:33, 6 March 2007 (UTC)
I've added a disambiguation page. However, I've also noticed that this page started out talking about photoreceptors in a molecular sense and many links here reflect that meaning (e.g. photopigment, photoreceptors, microbial etc. It has changed significantly from those earlier versions and now the original content is lost as it talks exclusively about photoreceptor cells at the expense of photoreceptor molecules, rendering many of those links nonsensical. I would suggest moving this page back to photoreceptor cell to reduce confusion and use this page to give an introduction to molecular photoreceptors instead, as originally intended when the page was created. - tameeria 21:10, 16 March 2007 (UTC)
[edit] Requested move
These two pages were merged a while ago, but only after the "photoreceptor" page underwent a change in topic. Originally, it was about "photoreceptor proteins" instead of "photoreceptor cells" (see here). It was at some point disambiguated for "photoreceptor cell" (see here) and then the protein content was dropped completely and the article evolved basically into a content fork of "photoreceptor cell" (see here) and consequently was merged with that page. As a result, many incoming links created over the course of the page's existence (e.g. plant and bacterial photoreceptors) now don't make sense at all (plants and bacteria don't have neurons, obviously).
I would suggest moving the current page back to "Photoreceptor cell" and replacing it with the content of Photoreceptor (disambiguation) as incoming links can mean a number of things besides photoreceptor neurons (e.g. photoreceptor molecules, organelles, organs etc.). I would guess that "photoreceptor cell" and "photoreceptor protein" are at least equally likely meanings for the term, being the "predominant" meaning only in their respective fields (neurology/cell biology versus biochemistry/molecular biology). Therefore, I think "photoreceptor" should be a disambiguation page pointing to these different meanings.
If anyone has comments or concerns about this proposed move, please feel free to discuss them here. - tameeria 19:41, 17 March 2007 (UTC)
- Moved. In order to maintain the edit history of the pre-merge "photoreceptor cell", I have moved it into the talk namespace at Talk:Photoreceptor cell/July 2006, and its talk to Talk:Photoreceptor cell/July 2006 talk. --Stemonitis 11:46, 23 March 2007 (UTC)
[edit] Local Graded Potential
I created a new page for Localized graded potentials and I am going to place a link to it under see also. Hope nobody objects. Paskari 18:44, 27 March 2007 (UTC)
[edit] Problem with absorbance curves
(I posted the same remarks on the image page, trying to find someone who knows about these)
I replaced these curves in the English wikipedia article on cone cells, because they have several problems:
- 1. They are unsourced, so can't be verified.
- 2. They show curves that are not even quite unimodal, unlike anything in the literture.
- 3. The curves don't fall off as much as expected, esp. at 400 nm, so are useless as in indication of visual sensitivity
- 4. It's really unclear whether these "asborbances" are supposed to like "responsivities". They don't look it. Maybe absorbances are supposed to be different from responsivities, and if so we should say so, but what I've seen suggests they should be the same.
Does anyone know where they came from, so we can check and adjust them, and say more clearly what they represent? Dicklyon 16:25, 30 September 2007 (UTC)
[edit] Ganglion cell part too long!
I think this part has too much information. At least more than should be expected from the wikipedia. It wasn´t written in a neutral enough fashion, IMHO, so I edited it a bit. Citotoxico (talk) 02:51, 23 May 2008 (UTC)
