at 0.5 degrees c , a temperature at which binding of gaba to the cell surface is considered to be the predominant component of the uptake process , the apparent affinity constant ( km ) was 0.82 microm and a minimum value for binding velocity ( vmax ) was 0.13 microm per min per 5 x 10 ( 5 ) cells .
C0699040
cell surface
C0007634
cells