Thierry Leclipteux asked: I ave problem in keeping stable monoclonal antibody-peroxidase conjugate at 4 0C. Is there any chemicals able to protect their activity. I do not want to keep them at -20 0C in glycerol. Thanks Try calling Dr Tim Gibson, ULIS Biotechnology, Leeds, UK. telephone +44-113-233-2599 they specialise in this type of problem. Philip Shaw Biodot Ltd