Abstract
The pathway for the phototransformation of the red-light-absorbing (Pr) to the far-red-light-absorbing (Pfr) form of native phytochrome A from pea was investigated by low temperature spectrophotometry. Four intermediates between Pr and Pfr were recognized. The first intermediate (lumi-R) was stable below −100°C. The other intermediates and Pfr appeared during warming of lumi-R to −80 °C (meta-Ra), −40 °C (meta-Rb′), −20 °C (meta-Rc) and 0 °C (Pfr). Each intermediate (lumi-R, meta-Ra and meta-Rc) and Pr was photointerconvertible as a two-component system at the temperature at which the intermediate had initially appeared. Meta-Rb′ is also photoconvertible to Pr. Prolonged red light irradiation of meta-Rb′ at −40 °C resulted in appearance of another intermediate (meta-Rb).
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Photochemistry & Photobiology, B: Biology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
