Membrane-Associated Polypeptides Induced in Chlamydomonas by Limiting CO2 Concentrations 1
AUTOR(ES)
Spalding, Martin H.
RESUMO
Chlamydomonas reinhardtii and other unicellular green algae have a high apparent affinity for CO2, little O2 inhibition of photosynthesis, and reduced photorespiration. These characteristics result from operation of a CO2-concentrating system. The CO2-concentrating system involves active inorganic carbon transport and is under environmental control. Cells grown at limiting CO2 concentrations have inorganic carbon transport activity, but cells grown at 5% CO2 do not. Four membrane-associated polypeptides (Mr 19, 21, 35, and 36 kilodaltons) have been identified which either appear or increase in abundance during adaptation to limiting CO2 concentrations. The appearance of two of the polypeptides occurs over roughly the same time course as the appearance of the CO2-concentrating system activity in response to CO2 limitation.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1055808Documentos Relacionados
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