Action spectra for conversions of phycochrome c from Nostoc-muscorum
Björn, G S and Björn, Lars Olof LU
(1978)
In Physiologia Plantarum
43(3).
p.195-200
- Abstract
- The reversibly photochromic pigment, phycochrome c, was extracted from the blue-green alga Nostoc muscorum strain A. Action spectra were determined for in vitro conversions of the pigment from the short wavelength to the long wavelength form and vice versa. The action peak for the absorbance decrease at 650 nm is at 630 nm. During this decrease there is only a slight increase of the absorbance in the green region. Green and yellow light (maximum efficiency at 580 nm) completely restores absorbance at 650 nm. The observations are explained by the existence of three spectrally different forms of phycochrome c: Pc630 and Pc650 which equilibrate in darkness and Pc580 which is reversibly photoconvertible to Pc630. We have also measured the... (More)
- The reversibly photochromic pigment, phycochrome c, was extracted from the blue-green alga Nostoc muscorum strain A. Action spectra were determined for in vitro conversions of the pigment from the short wavelength to the long wavelength form and vice versa. The action peak for the absorbance decrease at 650 nm is at 630 nm. During this decrease there is only a slight increase of the absorbance in the green region. Green and yellow light (maximum efficiency at 580 nm) completely restores absorbance at 650 nm. The observations are explained by the existence of three spectrally different forms of phycochrome c: Pc630 and Pc650 which equilibrate in darkness and Pc580 which is reversibly photoconvertible to Pc630. We have also measured the absorbance changes brought about by saturating irradiations with light of various wavelengths ("photostationary state spectrum"). Extreme photostationary states were obtained with about 650 nm and 500 nm light. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/134640
- author
- Björn, G S
and Björn, Lars Olof
LU
- organization
- publishing date
- 1978
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physiologia Plantarum
- volume
- 43
- issue
- 3
- pages
- 195 - 200
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- scopus:84981653413
- ISSN
- 0031-9317
- DOI
- 10.1111/j.1399-3054.1978.tb02563.x
- language
- English
- LU publication?
- yes
- id
- a2f3f3e7-ac0b-4d1d-acd0-a761e7ab792c (old id 134640)
- date added to LUP
- 2016-04-01 16:04:06
- date last changed
- 2021-01-03 03:18:32
@article{a2f3f3e7-ac0b-4d1d-acd0-a761e7ab792c,
abstract = {{The reversibly photochromic pigment, phycochrome c, was extracted from the blue-green alga Nostoc muscorum strain A. Action spectra were determined for in vitro conversions of the pigment from the short wavelength to the long wavelength form and vice versa. The action peak for the absorbance decrease at 650 nm is at 630 nm. During this decrease there is only a slight increase of the absorbance in the green region. Green and yellow light (maximum efficiency at 580 nm) completely restores absorbance at 650 nm. The observations are explained by the existence of three spectrally different forms of phycochrome c: Pc630 and Pc650 which equilibrate in darkness and Pc580 which is reversibly photoconvertible to Pc630. We have also measured the absorbance changes brought about by saturating irradiations with light of various wavelengths ("photostationary state spectrum"). Extreme photostationary states were obtained with about 650 nm and 500 nm light.}},
author = {{Björn, G S and Björn, Lars Olof}},
issn = {{0031-9317}},
language = {{eng}},
number = {{3}},
pages = {{195--200}},
publisher = {{John Wiley & Sons Inc.}},
series = {{Physiologia Plantarum}},
title = {{Action spectra for conversions of phycochrome c from Nostoc-muscorum}},
url = {{http://dx.doi.org/10.1111/j.1399-3054.1978.tb02563.x}},
doi = {{10.1111/j.1399-3054.1978.tb02563.x}},
volume = {{43}},
year = {{1978}},
}