Tokyo/Hill function fitting

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Deviation of Hill function



Ex.6.1


1.Hill function for the activator AHL

Figure 1

Without the repression by LacI( [LacI]=0 ), Ex.6.1 was described as


Ex.6.2

Therefore, in the steady state the Hill function for the activator AHL was given as

Ex.6.3
Ex.6.4

2.Hill function for the repressor LacI

Figure 2

When the concentration of AHL was assumed to be infinity, Ex.6.1 was described as


Ex.6.5

Therefore, in the steady state the Hill function for the repressor LacI was given as


Ex.6.6

Ex.6.7


However, the amount of LacI cannot be actually measured.So,we used the inducer IPTG to calculate the Hill function for LacI.
Assume that the reaction between [LacI] and [IPTG] is the equilibrium reaction,these concentration in equilibrium state were shown in Fig.3.


Figure 3

Therefore,the equilibrium constant k was obtained as


Ex.6.8





Expression6-2.JPG