Antibodies, Proteins, ELISA and RIA

We carry an extensive portfolio of mono- and polyclonal antibodies and proteins for research within Complement activation, Epigenetics, Neurodegenerative disorders, Oncology, Stem cells, Immunology and Endocrinology and many other fields.

Our ELISA range includes both CE and RUO marked assays for both Diagnostic and Research applications. Our kits covers a large variety of areas as Gastroenterology, Skeletal, Renal, Immunology, Oncology, Fertility etc.

quartett ensures for more than 35 years consistent quality of products. In 1997 we established our production site, which is
certified according to EN ISO 9001:2015 and EN ISO 13485:2016. Our quality management system guarantees products of
highest quality. All products are exclusively manufactured in Germany without outsourcing any production step.
The company specialized its product profile in the production of a variety of reagents for histology, cytology and IHC
including client-oriented production, IHC contract work as well as the production of monoclonal and polyclonal antibodies.
This includes our new line of rabbit and mouse monoclonal ‘Q clone’ antibodies.
Second expertise is the production and modification of synthetic peptides – also on customer request – with a HPLC purity
higher than 95 %. This includes protease inhibitors or peptides for antibody production. Furthermore, we offer peptide
analytic services with qualitative and quantitative analysis of amino acids.
Service and support of our valued customers are our daily businesses. A network of worldwide distributors guarantees global
customer supply. We participate at international exhibitions, such as MedLab in Dubai, Medica in Germany and various
congresses for pathologists. Furthermore, we are represented by distributors at exhibitions we are not able to attend.
After so many years it is again time to say thanks to each of our clients and business partners for trusting in us. Without them
we were not as successful as we are and we are proud to have each of you in our quartett family.

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, Diagnostic BioSystems Inc. is committed to enhancing immunohistochemistry results by providing innovative anatomic pathology reagents and systems to improve the practice of pathology. Since the inception, our prime focus has been to provide high quality products and exceptional customer service and support.
Diagnostic BioSystems provides cutting-edge in-vitro diagnostics to the anatomic pathology and histology market through direct sales in the domestic market and through international distributors to over 60 countries worldwide. Our product portfolio includes high quality primary and fluorescent antibodies (CF488 and FITC conjugated), autostainer, chromogens, detection kits and a wide range of ancillaries.
Diagnostic BioSystems is an ISO 13485:2016 certified cGMP compliant, medical device manufacturer.
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Medaysis develops and delivers primary antibodies, polymer detection kits for immunohistochemistry (IHC) and immunofluorescence (IF) single or double staining for cancer, infectious diseases, neuroscience and other life science research. Medaysis provides a comprehensive portfolio of products including more than 1,000 primary antibodies, a broad range of detection reagents and a variety of tissues.
We are passionate and strive to continuously introduce novel antibodies and new solutions to enable pathologists, histologists and researchers to design experiments, improve test accuracy and achieve reliable results. We recently introduced ultra-sensitive CloDiA™ PCR-based mutation detection systems designed with novel and proprietary primers that are able to detect 1% or less common somatic mutations in the genes.
Our mission is to provide advanced technologies and quality solutions that will empower the innovation and improve the practice of anatomic and molecular pathology professionals, ultimately to develop accurate diagnostic assays and personalized healthcare to benefit the patients and well-being of individuals around the world.
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