Chemical Modification kinectics

[Rafael Iosef Najmanovich Szeinfeld {S]

> the y axis is %inhibitory activity on a log scale and the x axis is the
> time of the modification reaction.. as the reaction proceeds, the
> inhibityory activity of the serpin should decrease..
> 100  -|*
>       |
>       | *
>       | 
>       |   *
> 10   -|
>       |       *
>       |
>       |   	 	*
>       |					*
> 1    ---------------------------------------------
>       0		30	    60		90
> the graph should be linear on this plot denoteing a pseudo first order
> reaction but it's not....

	Do you Have any idea about the error on your data ? 
	May be it's really linear...

					Rafael.

*-----------------------------------------------------------------------------*
* Rafael Iosef Najmanovich Szeinfeld   |MAIL : Depto. de Bioquimica - B10 INF.*
* Dept. Biochemistry  -Chemistry Inst. |       Universidade de Sao Paulo      *
* Dept. Math. Physics -Physics Inst.   |       Av. Prof. Lineu Prestes 748    *
* University of Sao Paulo              |       CEP 05508-900                  *
* E-MAIL : szeinfel at snfma1.if.usp.br   |       Sao Paulo - SP - Brazil        *
*-----------------------------------------------------------------------------*