GTC Biotherapeutics (fka GTCB)

[used to make chicken]

While many an academic loves the challenge of adding or removing the appropriate chain or piece of a chain after the protein has been produced, it wreaks havoc on a business plan. Nearly all of those procedures are costly, and cut way back on your final yield. More often than not, the decision is "let's not make that one."

I spent a lot of time thinking about this when I was in the chicken business. : )