Extended temperature optimum of photosynthetic reaction centers in Rhodobacterales

Photosynthetic reaction centers.

The capture of solar radiation and the conversion of its free energy into chemical energy involves a sequence of reactions that occur within a physical structure called the photosynthetic RC. Following the initial capture of a photon by antenna pigments, the photon is transferred to the RC pigments, where it gives rise to a separation and stabilization of charge across the photosynthetic membra...

Reaction centers of photosynthetic bacteria.

Primary Electron Transfer in Photosynthetic Reaction Centers

enhancement of the T-d8 concentration relative to EtOH (bulk solution has a value of =0.25) followed by a near-linear decrease after the break. Returning to the Fickian solution and using the slower turn on of the surface concentration could represent the EtOH diffusion into the polystyrene. Figure 9 with a = 1 would be indicative if an induction period was included. That the EtOH is constraine...

Photochemical Hole-burning in Photosynthetic Reaction Centers

The change in absorbance (hole spectrum) of the primary electron donor (P870) in bacterial photosynthetic reaction centers has been studied at 1.5-2.1 K following narrow-band excitation at several wavelengths within the P870 absorption band. The hole width is very large, suggesting a homogeneous linewidth on the order of 200-300 cm-‘. Possible interpretations of this highly unusual result, incl...

Primary processes in photosynthetic reaction centers

A b s t r a c t P h o t o s y n t h e t i c r e a c t i o n c e n t e r s r e a l i z e t h e p r i m a r y s t e p s o f t h e b i o c o n v e r s i o n o f l i g h t e n e r g y . They a r e c o m p l e x membrane p r o t e i n s w h i c h c o n t a i n s e v e r a l m o l e c u l e s o f p i g m e n t s and e l e c t r o n c a r r i e r s , o r g a n i z e d so a s t o t r a n s f e r e l e ...