Tetrasaccharide mapping data for LMWH-II, enoxaparin and UFH. Extracted ion chromatography (EIC) of LMWH-II (a), enoxaparin (b) and UFH (c). The star indicates unidentified tetrasaccharide peak. (d) The relative mass percentages of the heparin lyase II-resistant tetrasaccharides. T1, ΔUA-GlcNAc6S-GlcA-GlcNS3S; T2, ΔUA-GlcNAc6S-GlcA-GlcNS3S6S; T3, ΔUA-GlcNS6S-GlcA-GlcNS3S6S