To paraphrase Sir Edward Grey, the lights are coming on all over biology. It's like he's been bit by a rabid animal. The four real letters of the code will, hyperbolists tell us, revolutionise biology, medicine and our view of ourselves. Within it, apparently, is written part of what it means to be human. Recite those letters, roll them around the tongue.
Genes are certainly important.
If you are reading this article on a train, glance at the person to your left and to your right. Then, comfort yourself with the knowledge that two of the three of you will die as a result of your genes. Now, things are different. But it is anatomy, not surgery. The first heart transplant, it is worth remembering, was in 1967.