| Value |
185
Copies/reaction center
|
| Organism |
Cyanobacteria Gloeobacter violaceus |
| Reference |
John A. Raven Functional evolution of photochemical energy transformations in oxygen-producing organisms, Functional Plant Biology, 2009, 36, 505–515 p.511 right column top paragraph |
| Primary Source |
Koyama K, Suzuki H, Noguchi T, Akimoto S, Tsuchiya T, Mimuro M. Oxygen evolution in the thylakoid-lacking cyanobacterium Gloeobacter violaceus PCC 7421. Biochim Biophys Acta. 2008 Apr1777(4):369-78PubMed ID18298941
|
| Method |
Primary source: In this study, researchers compared the amino acid sequences of three extrinsic proteins involved in cyanobacterial oxygen-evolving processes, and investigated interactions between the PS II subunits in G. violaceus and Synechocystis as a control. In order to characterize PS II (including the Mn-cluster), they examined oxygen-evolving activity, thermoluminescence, delayed luminescence at 1.6 s after the flash and delayed fluorescence on the nanosecond time scale at - 196 °C. |
| Comments |
Oxygen flash yield data on Gloeobacter grown at
low irradiances (Koyama et al. 2008) suggest 185 chlorophyll a
per PSII reaction centre, so the PSI : PSII ratio is only 1.06, and
the density of the photosystems in low-light cells is
34 nmol/m^2 for PSII and 36 nmol/m^2 for PSI. See BNID 105048,105049 |
| Entered by |
Uri M |
| ID |
105046 |