| Range |
2-20 psec
|
| Organism |
Unspecified |
| Reference |
Rupenyan A, van Stokkum IH, Arents JC, van Grondelle R, Hellingwerf K, Groot ML. Characterization of the primary photochemistry of proteorhodopsin with femtosecond spectroscopy. Biophys J. 2008 May 1594(10):4020-30.PubMed ID18234812
|
| Method |
Femtosecond time-resolved spectroscopy, by probing in the visible- and in the midinfrared spectral regions. |
| Comments |
From the difference spectra associated with these dynamics, researchers conclude that there are two chromophore-isomerization pathways that lead to the K-state: one with an effective rate of approximately (2 ps)(-1) and the other with a rate of approximately (20 ps)(-1). At high pH (9.5), both pathways are equally effective, with an estimated quantum yield for K-formation of approximately 0.7. At pH 6.5, the slower pathway is less productive, which results in an isomerization quantum yield of 0.5. |
| Entered by |
Uri M |
| ID |
103608 |