A peroxidase protective buffer which stabilises HRP conjugates. It has 500 ml of PBS, pH 7,2, containing 0,5% BSA, antimicrobial preservatives and proprietary stabilising compounds.

It is compatible with all common blocking agents including Bovine Serum Albumin, skim milk powder and Polysorbate 20. Protexidase provides stability of the HRP enzyme and it also inhibits microbial growth in dilute conjugates.