Deerfield D W, Olson D L, Berkowitz P, Koehler K A, Pedersen L G, Hiskey R G
Biochem Biophys Res Commun. 1987 Apr 14;144(1):520-7. doi: 10.1016/s0006-291x(87)80540-5.
Equilibrium dialysis results are presented for Ca(II) and Mg(II) ion binding to human and bovine prothrombin and fragment 1. Ca(II) ions bind cooperatively, Mg(II) does not.