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Polar surface areaThe Polar Surface Area (PSA) is defined as the surface sum over all polar atoms, (usually oxygen and nitrogen), including also attached hydrogens. Additional recommended knowledgePSA is a commonly used medicinal chemistry metric for the optimisation of cell permeability. Molecules with a polar surface area of greater than 140 angstroms squared are usually believed to be poor at permeating cell membranes. For molecules to penetrate the blood-brain barrier, PSA should be less than 60 angstroms squared. See also
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Polar_surface_area". A list of authors is available in Wikipedia. |