Specifically, the HeLa line (human cancer-derived) is an exception (not sure if it's what you were referring to): https://en.wikipedia.org/wiki/HeLa https://en.

Specifically, the HeLa line (human cancer-derived) is an exception (not sure if it's what you were referring to): https://en.wikipedia.org/wiki/HeLa https://en.wikipedia.org/wiki/HeLa