1.   Because the proteins of a cell turn over rapidly, the cow proteins are expected to be rapidly replaced by human proteins.

2.   If the human mitochondria survived, the hybrid cow-human cell should become fully human as the cow proteins were replaced by natural turnover.

3.   The company said the hybrid cells quickly became more humanlike, as the human nucleus took control and displaced cow proteins with human proteins.

4.   The company said the hybrid cell quickly became more human-like as the human nucleus took control and displaced cow proteins with human proteins.