Permeability coefficient of lipid bilayer membrane to CO2 (see comments section)

Value 350 µm/sec Range: ±40 Table - link µm/sec
Organism Cyanobacteria
Reference Fridlyand L, Kaplan A, Reinhold L. Quantitative evaluation of the role of a putative CO2-scavenging entity in the cyanobacterial CO2-concentrating mechanism. Biosystems. 1996 37(3)229-38 p.232 table 1PubMed ID8924647
Primary Source Gutknecht J, Bisson MA, Tosteson FC. Diffusion of carbon dioxide through lipid bilayer membranes: effects of carbonic anhydrase, bicarbonate, and unstirred layers. J Gen Physiol. 1977 Jun69(6):779-94 p.787 2nd paragraph & fig.4PubMed ID408462
Method Primary source abstract:"Diffusion of (14)C-labeled CO(2) was measured through lipid bilayer membranes composed of egg lecithin and cholesterol (1:1 mol ratio) dissolved in n-decane."
Comments Note: ref gives 3,500±400µm/sec however primary source p.787 2nd paragraph gives 350±40µm/sec (an order of magnitude lower). This permeability coefficient is similar to that estimated for the red cell membrane
Entered by Uri M
ID 102624