Frequently Asked Questions (FAQ)

If you cannot find the answer to your question in this FAQ or the BioSamples Database help pages then please email us at

  • How frequent are updates?

    BioSamples Database content is updated daily. Information directly submitted or updated in a source should be reflected within 48 hours.

    The software powering BioSamples is updated at the start of each month.

  • What pattern do BioSamples accessions follow?

    BioSample accessions always begin with SAM. The next letter is either E or N depending if the sample information was originally submitted to EBI or NCBI respectively. After that, there may be an A or a G to denote an Assay sample or a Group of samples. Finally there is a numeric component that may or may not be zero-padded.