The BioTeZ Berlin-Buch GmbH is a Biotechnology company founded in 1992.
BioTeZ is partner of research institutions, the pharmaceutical industry and laboratory diagnostics.
Our sister company Steffens-Biotec, Ebringen (ISO 13485) is specialised in manufacturing CE in-vitro diagnostics.

Products and Services

Affinity Chromatography

We support mykotoxin and vitaminanalysis using very effective immunoaffinity columns and ELISAs, and by developing toxin- and detection conjugates.

ELISA Technologies

Use our experience in the field of ELISA development, the production of tests and components. Test our innovation “recoveryELISA” for therapeutic drug monitoring.


Outstanding Biotin binding capacities using our high-tech molecule improve assay performance.

Human Proteases/

Human proteases, ELISA & antibodies incl. the former Proteaimmun GmbH products and Services.

Biochemistry services

Extensive customer service in the field of immunochemistry like individual assay compounds or conjugates.

Polystreptavidin R Surface Functionalization Kit

Polystrept R combines the excellent binding capacity with a high chemo and thermo stability.Additional pre-coating serves to improve the outcome and especially for very inert surfaces to ensure high quality coatings with Polystreptavidin R.

Polystreptavidin R provides product consistency and helps to reduce variability in diagnostic assays. Test it; make the comparison of BioTeZ Polystreptavidin R Coating Kit and surface activated beads or other surface activations. Typical applications where Polystreptavidin R is used: IVD assays, isolation and purification of biotinylated molecules, ligand coupling.

The BioTeZ Polystreptavidin R Coating Kit (Product Code: BTCK-MC) is useful for adsorptive coatings on microplates, beads, membranes etc. made of metal, nitrocellulose, ceramic, silicon, glass or plastics like Polystyrene, Polyethylene, Polypropylene, Polycarbonate, Poly(methyl methacrylate) PMMA or Polyamides with “Maximum Biotin Binding Capacity”. More Informations

New method for measuring effect of drugs

BioTeZ starts the project for the development of a companion diagnostic procedure. The aim is to determine the optimal drug dose for each patient to reduce side effects, to achieve the Therapeutic Window and to increase the effectiveness of the active ingredients by optimizing the dosage (Therapeutic Drug Monitoring). The project is being funded on behalf of the State of Berlin through the Program for the Promotion of Research, Innovations and Technologies (Pro FIT) and partially funded by the European Regional Development Fund (ERDF). More Informations

BBI Solutions

BBI Solutions completes Acquisition of BioTeZ Berlin-Buch GmbH and Steffens Biotechnische Analysen GmbH! Read

Read More