|
Title
|
|
|
|
The plant plasma membrane b-type cytochrome : a review
|
|
|
Author
|
|
|
|
|
|
|
Abstract
|
|
|
|
| The plasma membrane of higher plants contains a specific b-type cytochrome. This major component has a high standard redox potential (average E'(0) of + 140 mV) and an a-band absorption maximum near 561 nm. Ascorbic acid rapidly reduces the cytochrome but NADH or NADPH are ineffective as a reductant. The redox protein has been detected in purified plasma membranes of a variety of plant species and tissues and it appears to be a common plasma membrane component. Specific concentrations range from 20 to 400 pmol per mg protein. Initial attempts to purify the protein indicated a molecular weight of 31 kDa and suggest that the cytochrome may be a glycoprotein. The current hypotheses on the physiological importance of the plant plasma membrane cytochrome are focused on ascorbate-mediated transmembrane electron transport and blue light photoperception. |
|
|
|
Language
|
|
|
|
English
|
|
|
Source (journal)
|
|
|
|
Belgian journal of botany / Royal Botanical Society of Belgium. - Brussels, 1990 - 2009
Bulletin de la Société royale de botanique. - Bruxelles, 1862 - 1989
|
|
|
Publication
|
|
|
|
Brussels
:
1994
|
|
|
ISSN
|
|
|
|
0778-4031
[print]
1781-8656
[online]
|
|
|
Volume/pages
|
|
|
|
127
:2
(1994)
, p. 171-183
|
|
|
ISI
|
|
|
|
A1994QK87100007
|
|