Definition of "heparan" [heparan]

• A biologically active polysaccharide that exists only as the sulfate (noun)

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• "Surfen is a small molecule that inhibits the actions of certain polysaccharide molecules called heparan sulfate proteoglycans (HSPG) that are found on the surface of cells."
• "Sperm express molecules known to interact with HIV's envelope, such as heparan sulfate and mannose receptors."
• "They found that the insulin-producing cells need heparan sulphate, a complex sugar, to survive."