Maybe you could ask this guy?
http://www2.hawaii.edu/~darin/cv.htm
"BARATTI Jacques" <baratti at luminy.univ-mrs.fr> wrote in message
news:3.0.1.32.20020821140707.00737ad4 at luminy.univ-mrs.fr...
>> We look for a comemrcialy vailable preparation of leukoberbelin blue a dye
> used to assay Mn oxidizing activity. Anyone having information on this
> please contact us
> J. Baratti
>>> Jacques C. BARATTI
> Biocatalyse et Chimie Fine
> Faculté des Sciences de luminy, case 901
> 13288 Marseille cedex 9
> Tel: +33 4 91 82 93 77
> Fax: +33 4 91 82 93 62
> email: baratti at luminy.univ-mrs.fr>> You are active in the field of Applied Biocatalysis and interested to join
> the section of Applied Biocatalysis of the European Federation of
> Biotechnology (ESAB) ? It is free and very easy, just register on EFB web
> site http://www.efbweb.org/members/joinus.htm> You will receive informations about the section activities and how to
> participate.
>> Congress "Engineering Enzymes for Biocatalysis using directed evolution"
> Paris Pasteur Institute Sept 16-18
>http://www.scifrance.org/congres/EngineeringEnzymes/>> ---