Lambert-Beer Law and Proteinpolymers

[Dima Klenchin]

In article <3574F8C9.554A at snphysio2.wilhelm.uni-bonn.de>, 007 at snphysio2.wilhelm.uni-bonn.de wrote:
>Hi Netters !
>
>I've read the Lambert-Beer Law does not apply
>to proteins which tend to build polymers. The conformational changes
>can influence the absorption spectra of the protein.

That's not what Lambert-Beer law is about. It says that the relationship 
between concentration and absorption is linear. That's all. I never heard
of any substance that would violate this law. 

The way you worded your question, it reads that some protein's 
absorption coefficient changes upon polymerization. Entirely possible
and not surprising at all. L-B law should still apply as long as it is 
true solution. 

        Dima