the equilibrium constant at 25 degrees c , measured using 31p nmr , for the reaction mg [ alpha beta ch2 ] atp + creatine in equilibrium mg [ alpha beta ch2 ] adp + phosphocreatine + h+ is 2.2 x 10 ( -12 ) m compared with a value of 2.5 x 10 ( -10 ) m for the same reaction with the normal substrates , corresponding to a difference in delta g0 values of 11.7 kj x mol-1 .
C0010286
creatine
C0031634
phosphocreatine