Additional evidence for the pivotal role of extracellular cysteines in the APN molecule was obtained
when substitution of any of these six cysteines caused complete loss of surface expression and enzymatic activity .
Additional evidence for the pivotal role of extracellular cysteines in the APN molecule was obtained when substitution of any of these six cysteines caused complete loss of surface expression and enzymatic activity .
Additional evidence for the pivotal role of extracellular cysteines in the APN molecule was obtained when substitution of any of these six cysteines caused complete loss of surface expression and enzymatic activity .