Solution
= Solution
For an assay begun by mixing free <enzyme> and <substrate>, take $\boxed{[S](0)=S_0>0,\ [E](0)=E_0>0,\ [C](0)=[P](0)=0}$. The complex has not yet formed and no <product> has been made. The later small-<enzyme> limit assumes $E_0\ll S_0$. Other preincubation protocols could require nonzero initial complex, but these <initial conditions> are the ones used by the stated <inner expansion>[inner solution].