what does it mean to be human? Putting human genes in animals starts to blur the human animal division. This is a reason for people NOT to do it. For me it is more a reason to do it.
C. Kaleta, F. Centler, and P. Dittrich. 34, page 117-124. Humana Press, (October 2006)Proceedings of the 7 th Conference on Protein Expression in Animal Cells(PEACe).