| abstract |
The invention relates to a reagent consisting of at least one enzyme and at least one other substance, which are covalently or noncovalently bound to a particle, which is smaller than or is equal to 1000 Angstrom in diameter. The invention also relates to method and use of the reagent for determination or studies of a cell or a virus or another component in a sample. According to the invention, these determinations are made with for example some ELISA-technique (competitive, sandwich, etc), employing the reagent preferably in the form of a suspension in buffered water, instead of and in the same way as described for soluble enzyme conjugates. The substance can be antibody, a lectin, avidin or an antigen, the enzyme can be for example peroxidase, alcaline phosphatase, and the particle can be an inorganic or an organic polymeric compound or a combination thereof, as, for example, tresyl-activated glycerylpropyl-silica. |