Activity assay for phenol sulfotransferases

[/G=India/S=Syngene/OU=QUESTIN-BLPO/O=TMNL.QUI/ at LANGATE.gb.sprint.com]

     Hello netters,
     
     Could anyone out there let me know if there is any non-radioactive 
     activity assay for the phenol sulfotransferases. All the literature 
     surveyed mentions a radioactive assay.Please answer this at the e-mail 
     add.  mentioned below.
     
     Thanks in advance,
     Sharmishtha
     e-mail: india.syngene at questintl.com