[ pŏl′ē-ăn′ī′ən ]
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Any of multiple anionic sites on proteoglycans in the renal glomeruli that restrict filtration of anionic molecules and facilitate filtration of cationic proteins.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.