Fig. 8.
Determination of the amount of heparin bound by Protein A Sepharose–bound antibodies.
Periplasmic fractions of antiheparin antibodies were allowed to bind to Protein A Sepharose beads. The beads were washed and the antibody-bead complexes were incubated with FLUOS-labeled heparin. After washing, the fluorescence of the bound heparin was determined.