Which of the following does not use specific transport proteins?
Permeability of lipid bilayer correlates closely with solute oil-water partition coefficient, molecular size, and hydrogen bonding potential in solubility-diffusion framework. Gases such as oxygen, molecular nitrogen, carbon dioxide and nitric oxide possess small molecular weight under 50 Daltons, non-polar character lacking hydrogen bond donors or acceptors and high solubility in hydrocarbon, allowing direct dissolution into hydrophobic acyl chain core and rapid transverse diffusion without assistance, permeability coefficient on order of ten to hundred centimeters per second. This explains i
Ref: Lodish et al., Molecular Cell Biology, 8th ed., Chapter 11: Lipid Bilayer Permeability – Nonpolar Gases.
