The same issues are in play for purification of proteins or antibodies from CHO cells (Chinese Hamster ovary). It may be worse since they must purify from lower yields in the initial stages. To grow tissue culture cells, the media also has additives such as calf serum, antibiotics, hormones.
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I wouldn't say the same issues are at play. Note even close.
Tissue cultured cells that express recombinant proteins are contained in a far more controlled environment than a herd of goats, which are exposed to God-knows-what in terms of environmental pathogens.
Basically there are a panoply of additional risk factors associated with production of proteins in a herd of transgenic animals vs. a culture of transgenic cells.
If there wasn't, GTCB would be valued at about 100X what it is now. Seriously.
The reason why I am a shareholder (at this valuation) is because I believe that GTCB can overcome this issue. Simple, really.
