I have tried a reagent from Clontech and was not happy with the result.
Although I have never tried it, Tropix has chemiluminescence assay for
beta-galactosidase tropix at biotechnet.com 800-542-2369
no connection with the above mentioned companies
Soon Paik, M.D.
National Surgical Adjuvant Breast and Bowel Project (NSABP)