A novel method for the rapid purification of human and rat fibrin(ogen) degradation products in high yields.

A novel method is described for the preparation and purification of fibrin(ogen) degradation products in high yields. The high yields are due to two factors: a) an improved preparation method in which the heterogeneity in the size of the degradation products D is greatly reduced by performing the digestion with plasmin at well-controlled calcium concentrations (see ref.[22]). b) a new purification method, which includes Sephadex G-200 filtration and separation of D and E fragments by preparative isoelectric focusing. The latter step gives a complete separation of D and E fragments, without any overlap, and with a nearly 100% recovery in a short period of time. The properties of human and rat fibrin(ogen) degradation products are very similar.