Biologically active conjugates and their preparation and use

摘要

Water-soluble, biologically active conjugates comprising residues of (1) a biologically active protein or glycoprotein having primary amino groups, (2) a heteropolymer of D-mannuronic acid and L-guluronic acid and (3) an alkyleneglycol of 2 to 6 carbon atoms, the said residue (2) being linked to (1) by an amide linkage and to (3) by an ester linkage, which conjugates have increased activity at higher pH values and higher temperatures and a process for their preparations.