how do i calculate the substrate concentration needed relative to Km to produce a rate relative to Vmax which is

Question

0.1 x Vmax

??

I think i need to manipulate the michaelis menton eq but when i do it im left with [s] in the amount

please help

lib

Answer 1

Velocity= Vmax*S/(S+Km)

where S is the substrate concentration

.1Vmax= Vmax*S/(S+Km)

.1(S+Km)=S
S(.9)=Km
S= Km/.9

check my math.