Grandjean J, Laszlo P
C R Seances Acad Sci III. 1982 Jun 28;294(23):1099-100.
Decalcified bovine Gla protein binds sodium cations on the three gamma-carboxylglutamic (Gla) residues. Sodium-23 nuclear magnetic resonance serves to determine the correlation time tau c of bound sodium ions. Its value (tau c = 2.5 ns) matches the reorientational correlation time of the protein (tau R = 2.6 ns).