The significant cost savings to be had through using transgenic livestock instead of traditional methods of protein production have been well documented, and comparisons make for stark reading. To illustrate, experts have estimated that producing a single gram of therapeutic protein using traditional cell lines such as Chinese Hamster Ovary (CHO) cells can cost anywhere from $300 to $3,000 (€221 to €2210). In contrast, using a transgenic goat to produce the protein in milk drops the cost to $20-$105 per gram, and transgenic hen eggs are even cheaper, working out at around $0.1-$0.25 per gram of protein