Figure 3.

Precipitation measured as Δ light absorbance at 450 nm, of mixtures of 100 μl volumes of unfractionated heparin (UH), Fragmin (F), dextran sulphate (DS) (a), N-desulphated heparin (NDSH), O-desulphated heparin (ODSH) or poly-L-glutamic acid (PGA) (b), with 100 μl volumes of a 1 mg ml⁻¹ solution of the polycation (PLL) and 100 μl volumes of UH or DS with 100 μl volumes of a 2000 p.n.u. ml⁻¹ solution of Alternaria tenuis (c). Values are corrected for controls. Mean±s.e.mean values (n=4) are shown.