A-YES® test kit for the detection of estrogenic effects

In our uniquely developed A-YES® (Arxula yeast estrogen screen) test kit, the best properties of all effect-based are combined.  This non-ELISA based method enables you to determine the concentration of estrogens and estrogenic substances in aqueous samples to the precision of single-digit ng/L range.

The robust measurement method is insusceptible to microbial flora and therefore can be applied to complex samples without significant pretreatment (for example, samples from sewage treatment plants or those with high salt content). Moreover, sterile conditions are not required. The ready-to-use yeast offers the benefit of significantly reducing workload and workflow. The recombinant test organism Arxula adeninivorans can handle samples that have different salinity and are spiked with estrogenic substances on a single plate within approximately 26 hours. By using standardized production conditions, we ensure the consistent quality of our test organism.

The A-YES® test kit is suitable for the analysis of

  • Ultrapure, drinking and mineral water
  • Surface water
  • Ground water and well water
  • Sewage
  • Seawater and brackish water
  • Aqueous extracts

  • and for substance testing

The A-YES® test kit has a low-detection limit and is extremely easy-to-use and comes with free analysis software making it ideal for quality control in environmental and food analysis, in addition to various fields of application in biotechnology. Click here for more information on estrogens and estrogenic substances.

Duration of  assayca. 26 h
Number of Samples (EEQ)40
Number of Samples (LID)max. 4
Validationinterlaboratory test
Calibration range*0 – 80
Limit of Detection*1,8

* ng/L  17β-Estradiol (E2)

The A-YES® test is based on a genetically modified strain of the A. adeninivorans yeast which has been modified to bind with the human estrogen receptor, hERα. Binding of androgenic substances to the receptor subsequently activates production of a secretory reporter enzyme. The amount of enzyme activity correlates to the total concentration of estrogenic substances in the sample. With the addition of the chromogenic substrate p-nitrophenyl phosphate, enzyme activity can be measured photometrically. 17 β-estradiol (E2) is used as a reference standard for calibration and quantification.

TEFp = translation-elongation factor promotor / hERα = human estrogen receptor alpha gene / GAAp = glucoamylase promotor / phyK = phytase reporter gene.

The detection is carried out photometrically after enzymatic reaction with a chromogenic substrate (p-nitrophenylphosphate).

The color-change reaction is catalyzed by the enzyme phytase:

Enzymatische Reaktion gelb EUSAAT Poster

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 Click here for the A-YES® data sheet

Every kit comes complete with BioVAL®

Datenanalyse-Software BioVAL

Get statistical analysis of your data in the form of a “Certificate of Analysis” with BioVAL®. All the important parameters from LOD to LOQ are conveniently summarized in a graph. QuoData software is not only reliable but also certified. Learn more here!

Your Contact

M. Sc. Martin JähneLaboratory Manager, Research & Development in Biotechnology