Talk:P680

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Untitled, 2006-11-02[edit]

This could do with some context for those who know nothing of the subject. m.e. 05:08, 2 November 2006 (UTC)[reply]

Added LHCII and corrected the fact that there are 2 chlorophyll a molecules per P680. None the less the primary electron acceptor is a feofytin, problem is this molecule doesn't seem to exist in english. Anny help about it's english name please. It's feofytine in Dutch and feofytin in German and such. --Snelleeddy 21:18, 27 May 2007 (UTC)[reply]

It should be pheophytin. —Preceding unsigned comment added by Kasper90 (talk • contribs) 20:36, 18 September 2008 (UTC)[reply]

This article isn't right. The 'P' in P680 doesn't stand for Photosystem, but for Pigment. P680 is just one pigment and not a whole photosystem. —Preceding unsigned comment added by 94.210.174.187 (talk) 19:56, 17 September 2008 (UTC)[reply]

I rewrote the article because there were too many mistakes to correct it in other way. R.L. 147.231.252.83 (talk) 12:53, 19 September 2008 (UTC)[reply]

Oxidized P680 (P680+) is the strongest biological oxidizing agent known???? But it's already been oxidized. — Preceding unsigned comment added by 66.103.120.175 (talk) 17:43, 13 November 2011 (UTC)[reply]

The article seems to imply that P680 always acts as a dimer, but I think details from this article from the Journal of Photochemistry and Photobiology A: Chemistry with information about the structure and functioning of P680 needs to be considered: "P680, the primary electron donor of photosystem II" The article indicates that P680 is not a special pair and is made up of four weakly interacting chlorophylls. -- 18.111.59.56 (talk) 14:05, 10 March 2015 (UTC)[reply]

The already cited article from Raszewski from 2008 says otherwise. PD1 and PD2 from the special dimer have a very short distance and are slightly tilted out of the coplanar plane. Raszewski mention, that this is the reason for it's enormous high redox potential. Knapp et al. (Ishikita, 2005) showed in calculations of the redox potential of various components in P680, that the charge most likely resides directly after excitation upon chl_D1, before relaxing and forming the exciton [P_D1/P_D2]^•+ Pheo^•-. So the special pair can be seen as one reaction center, forming together with two addition chlorophyls the pigment 680.-- 134.61.103.46 (talk) 11:45, 29 October 2015 (UTC)[reply]