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.

BioTeZ Professional Assay Development & Manufacturing Tools

Immbolisation & Detection

Polystreptavidin R is a chemically modified polymerized Streptavidin characterized by an extraordinary high Biotin binding capacity.

Immbolisation & Detection
TA-PAS Labelling System Polystreptavidin Polystreptavidin Coating Solution Polystreptavidin Coating Kit Glass Polystreptavidin Coating Kit Streptavidin Coating Kit Streptavidin Poly-HRP Streptavidin Coated Microplates Biotin Labelling Kit TA-PAS Labelling Kit TA-PAS Labelling Antibody TA-PAS Labelling Antibody Poly-HRP Labelled Kit & Bulk Ware Customized Services Conjugates Coatings Coated Microplates Oligo-nucleotides Development & Test Services Labelling Kits Gold Nano particles Coating Kit Poly-HRP Labelling Kit Biotin Labelling Kit Gold Nanoparticles Coating Kit Customized Solutions Streptavidin

Biotin Labelling Kit

The BioTeZ Biotinylation Kit contains the reagents for the labeling of antibodies and other proteins and the purification of the biotinylated product.
The coupling reaction takes place at primary amino groups on the target molecule using a N-Hydroxysuccinimide (NHS) ester-activated biotin, which form stable amide bonds. Proteins generally have a sufficient number of amino groups for coupling, both N-terminal and lysine residues. In this kit, Sulfo-NHS-LC Biotin (sulfosuccinimidyl-6-[biotin-amido] hexanoate) is used, that contains a spacer group with 6 carbon atoms and a length of 22,4 Å to increase the distance between the target molecule and the biotin groups. 

Products and Services

Affinity Chromatography

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

Primer/Oligonucleotide Synthesis

Long term experience in the field of DNA and RNA primer synthesis guarantees very high quality. We offer various services, fast shipment and ease your budget.

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

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