Aggregation profiles of acid-solubilized fibrin monomers derived from normal, DG-normal, Niigata, and DG-Niigata fibrinogen. Aggregation of acid-solubilized fibrin monomer was studied by monitoring absorbance at 350 nm. Each fibrin monomer was prepared as described in Materials and Methods. DG-normal and Niigata fibrin monomer were expressed as Normal (+Glycosidase) and Niigata (+Glycosidase).