Ancient blood lines
A collaboration between the Benesch group and researchers at the Universities of Chicago, Texas, and Nebraska have identified the evolutionary "missing link" through which haemoglobin - the essential four-part protein complex that transports oxygen in the blood of virtually all vertebrate animals -
evolved from simple precursors. And they found that it took just two mutations more than 400 million years ago to trigger the emergence of modern haemoglobin's structure and function. The study was published online in Nature on May 20.