Toward a Biotechnological Heparin through Combined Chemical and Enzymatic Modification of the Escherichia coli K5 Polysaccharide - Naggi, Annamaria; Torri, Giangiacomo; Casu, Benito; Oreste, Pasqua; Zoppetti, Giorgio; Li, Jin-Ping; Lindahl, Ulf (Seminars in Thrombosis and Hemostasis, 2001)