Editorial Volume 11, Issue 3 pp 847—848

Protein S in preventing thrombosis

Figure 1. Wild type FIXa binds to Protein S, but the binding ability was abolished due to the mutation of the amino acid residues- lysine 126 (K126), lysine 132 (K126) and arginine 170 (R170) in the heparin-binding exosite region of FIXa.