. 2012 Jul 4;152(3):275–283. doi: 10.1093/jb/mvs073

Table II.

Kinetic constants of the sulfation of ractopamine and salbutamol by human SULT1A3^a.

	V_max (nmol/min/mg)	K_m (µM)	V_max/K_m	K_i (µM)
Ractopamine^b	170.7 ± 6.0	27.52 ± 1.91	6.20	222.3 ± 16.6
Salbutamol^c	77.17 ± 0.81	332.7 ± 12.2	0.23	—

^aResults represent means ± standard deviation derived from three determinations.

^bKinetic parameters were determined based on the equation for substrate inhibition kinetics.

^cKinetic parameters were determined based on the equation for Michaelis–Menten kinetics.