Stemride International maintains the hESC line repository under rigorous quality control.

We apply karyotype analysis, surface antigen analysis, and other tests to secure purity and sterility of lines. The lines have been maintained for substantial period of time to ensure their survivability and pluripotency. Major surface markers are checked periodically as well as chromosomal composition of cells. Special attention is given to the subculturing after freezing, thawing, and replating.

Our quality control procedures and protocols enable us to fully guarantee essential cell properties and post-thaw survivability.