Yes. Some of the proteins in the cells would be different to the host cells, due to the exogenous stem cell source. This might be detectable with mass spectrome

Yes. Some of the proteins in the cells would be different to the host cells, due to the exogenous stem cell source. This might be detectable with mass spectrometry (protein sequencing is otherwise difficult and laborious). There might also be different post translational modifications on the lab cells.