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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)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physiologia Plantarum
volume
43
issue
3
pages
195 - 200
publisher
Wiley Online Library
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
2007-07-27 14:53:25
date last changed
2017-09-24 04:23:11
@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    = {Wiley Online Library},
  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},
  volume       = {43},
  year         = {1978},
}