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Frequently Asked Questions

Where do you get your human cell cultures from?

We have long standing relationships with global biotechnology companies who we buy our tissue models from. They source them from consenting donors, usually as a by-product of cosmetic surgery.

What happens if I can’t provide a molecular weight for my test item?

This request only applies to the DPRA test. If you aren’t able to provide the molecular weight, you can detail the list of constituents with percentage compositions and we can approximate it using the guidance in the Test Guideline. As a last resort, the test item may be run neat (liquids) or dissolved at the highest soluble concentration (solids) then combined at a 1:10 or 1:50 ratio using the Cysteine and Lysine containing peptides respectively.

Can you perform an Ames test at your laboratory?

We don’t provide the Ames test, as it uses animal components. We do provide the BlueScreen assay, a genotoxicity test that covers all types of genotoxicity: anugens, clastogens, and mutagens.

How long will my test take?

XCellR8’s tests can take as little as 4 weeks, up to a maximum of 12 weeks. We’ll always try our best to accommodate urgent requests. Please do bear in mind that the timeframe starts at the point we receive your sample and the accompanying information that we ask for in order to start a study, and finishes when we send your draft report.

When will I receive my final report?

Most of our tests take 6-8 weeks from receipt of your sample to the first draft report, although please note sometimes it can be slightly shorter or longer depending on the test. We ask for your comments on the draft report within a week, and your final report will be with you after we’ve then completed our final QA checks.

We don’t use a Purchase Order system or else Purchase Orders take a long time to issue in my organisation. Can I still start my study?

Yes. In these circumstances, we will usually issue the invoice at the beginning of the study and ask for payment within 30 days.