. . "|FRAME: HEPARIN \"Heparin\"| is a polymer mainly composed of a repeating trisulfated disaccharide unit composed of |FRAME: CPD-12518| and |FRAME: CPD-12533| linked by a (1->4) bond (often referred to as IdoA(2S)-(1->4)-GlcNS(6S)). Consecutive glycosidic linkages formed between C1 of |FRAME: CPD-12533| in one base unit and C4 of |FRAME: CPD-12518| of another unit result in the formation of the heparin polymer. While |FRAME: CPD-12518| can be substituted by |FRAME: CPD-12521|, and |FRAME: CPD-12533| can be replaced by |FRAME: N-ACETYL-D-GLUCOSAMINE|, |FRAME: N-sulfo-D-glucosamine|, |FRAME: CPD-12545| or |FRAME: CPD-12565|, the basic non-substituted disacchride accounts for at least 85% of heparin isolated from beef lung and about 75% of heparin from porcine intestinal mucosa |CITS: [Casu89][Gatti79]|."^^ . . . "heparin"^^ . "enoxaparin"^^ . . "heparin"^^ .