Since their inception in January of 2006, Assay Biotechnology has been a worldwide contributor of industry-leading antibody production and engineering and assay technologies, fluorescent dyes, quenchers, recombinant proteins and synthetic peptides.

Located in the heart of California’s San Francisco Bay Area, they have strived to answer the global need for high quality assay kits and immunological reagents used in pharmaceutical and academic research that predominantly formulate the basis of healthcare.

Product Categories 




  • Sandwich ELISA Kits
  • Chemiluminescent Sandwich ELISA kits
  • Cell-Based ELISA Kits
  • Cell-Based Phospho ELISA Kits
  • DNA-Binding ELISA Kits
  • Phospho DNA Binding ELISA Kits
Assay Biotech is a primary manufacturer of over 10,000 highly specific primary antibodies against targets implicated in various cellular processes including but not limited to cell adhesion, cancer, cell cycle, apoptosis, vesicle trafficking, signal transduction and macromolecular biosynthesis. Each antibody is produced in rabbits using synthetic immunogen peptides and purified via immunogen-specific affinity chromatography.  Assay Biotech offers a series of fluorescent dyes and quenchers that support a diverse range of molecular detection and staining methods. Each dye has been tested to meet the highest quality standards and validated for use in labeling, conjugation, fluorescence analysis and indication of target activity.

Assay Biotechnology was founded in 2006 in the San Francisco Bay Area. They have produced many high quality, high specificity polyclonal antibodies for the OEM markets for five years. Their inventory covers over 5,000 validated, pre-made antibodies spans a wide range of cellular pathways, including over 1,000 phospho-specific antibodies.

In addition to providing a vast inventory of fine research polyclonal antibodies, Assay Biotechnology is striving to produce an extensive range of human genome wide and regulatory phosphorylation site antibodies by 2015.

All of antibodies are purified by affinity-chromatography using epitope-specific immunogens. After passing ELISA assays, all antibodies undergo rigorous quality control utilizing multiple validation methods including Western blot (WB), immunohistochemistry (IHC), immunocytochemistry (ICC), or immunofluorescence (IF). Any antibodies must have at least two applications of WB, IHC, ICC/IF, and/or ELISA before being released. All of their antibodies are tested for Western blots with crude lysates from cells or tissues and not over expressed or pure proteins.



Product Overview


2,000+ ELISA kits for phospho- and total proteins, transcription factors, cytokines, growth factors and their associated receptors: Traditional Sandwich ELISAs, High-Sensitivity ELISAs, One-Step ELISAs, Ultra-Sensitive ELISAs, Cell-Based ELISAs, DNA-Binding ELISAs.



150+ colori- and fluorometric assay kits for metabolic enzymes and metabolites: Carbohydrates, lipids, amino acids, metal ions, neurotransmitters and more.



10,000+ primary antibodies for WB, IHC, ICC, IF and ELISA: Phospho-specific, methyl-specific, acetyl-specific, cleaved-specific, non-phospho and total protein antibodies.
Antibody Range



700+ fluorescent dyes and quenchers for labeling, conjugation and fluorescent analysis: Thiol-reactive dyes, positively-charged rhodamine dyes, pH-dependent and independent dyes and fluorophores.



10,000+ recombinant proteins and synthesized peptides: Cancer and signaling proteins, CD antigens, cytokines and growth factors, membrane proteins and receptors, transcription factors, kinases, phosphatases, proteases, synthetases and more.


First for Antibodies

Stratech Scientific have been successful in a recent antibodies tender from the Southern Universities Purchasing Consortium. In the award criterion Read More…