A large multimeric glycoprotein component of the basement membrane; particularly its unstained laminae; a major protein component of the laminae of the renal glomerulus.
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lam·i·nin 'lam-ə-nən n a glycoprotein that is a component of connective tissue basement membrane and that promotes cell adhesion
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lam·i·nin (lamґĭ-nin) an adhesive glycoprotein, comprising a number of cell- and tissue-specific isoforms, that is a component of the basement membrane; it binds to heparan sulfate, type IV collagen, and specific cell-surface receptors and is involved in the attachment of epithelial cells to underlying connective tissue.Medical dictionary. 2011.