title: [Beta-galactosidase from E. coli as a marker in immunoenzyme analysis].
abstract: In the present review the authors analyze factors influencing sensitivity of the enzyme immunoassay (EIA). beta-Galactosidase from E. coli was chosen as a marker enzyme. Physico-chemical properties of the enzyme, detection methods and various ways of obtaining chemical conjugates with antigens and antibodies are discussed. Some examples of using beta-galactosidase as a label in homogeneous and heterogeneous EIA are given which enables different compounds to be analyzed with a high sensitivity. New approaches employing gene engineering for constructing "fusions" between beta-galactosidase and antigens (alternative to chemical conjugates) are discussed that can be used in the near future.
authors.forename: A N
authors.initials: AN
authors.lastname: Markarian
authors.forename: A M
authors.initials: AM
authors.lastname: Egorov
authors.forename: I V
authors.initials: IV
authors.lastname: Berezin
mesh_terms: D004926:Escherichia coli / Q000201:enzymology*; D005696:Galactosidases / Q000032:analysis*; D007124:Immunoenzyme Techniques; D001616:beta-Galactosidase / Q000032:analysis*
chemical_list: D005696:Galactosidases; D001616:beta-Galactosidase
vernacular_title: Beta-galaktozidaza E. coli kak marker v immunofermentnom analize.