at least 20 different peptides of keratin have been identified, each with a
different molecular weight.  pan keratin is a cocktail of more than one
peptide.  i am not sure which peptides 903 refers to, but the company selling it
should be able to supply you with that information.
patsy

"Klassen, Shannon SDH" wrote:

> When people say they are using cytokeratin 903 exactly what are they talking
> about.? Thanks for the help.
>
> Shannon Klassen
> IHC Tech
> Saskatoon Health District
> Saskatoon, Canada