I’m asking for information showing that this cell line was used.
I’m not one to believe a press article. Just because someone says something (no matter how convincingly), it does not make it true.
So, until then - Im asking for that information/proof.
The information comes from a Regeneron spokeperson Alexandra Bowie
This search links to multiple stories
https://www.google.com/search?q=alexandra+bowie+regeneron&source=lnms&tbm=nws&sa=X
The reference to the HEK line is also contained in this PDF produced by Regeneron
https://science.sciencemag.org/content/sci/suppl/2020/06/15/science.abd0831.DC1/abd0831_Baum_SM.pdf