Molecular weight analysis of LMWHs (a) SEC analysis of LMWHs; (b) PAGE analysis of heparin oligomers trapped on the different MWCO membranes: Lane 1, dp10; Lane 2, partially digested bovine lung heparin ladder; Lane 3, 30KT; Lane 4, 10KT; Lane 5, 5KT; Lane 6, 3KT; Lane 7, 3KP.(c)PAGE analysis of LMWHs: Lane 1, dp10; Lane 2, partially digested bovine lung heparin ladder; Lane 3, UFH; Lane 4, LMWH-I; Lane 5, LMWH-II; Lane 6, enoxaparin.