The Alphabet of Life Has Nineteen Letters

What's happening

A team from Columbia, Harvard, and MIT, publishing in Science on April 30, reported the creation of an E. coli strain called Ec19, engineered to build its small ribosomal subunit without isoleucine. Every cell on Earth, from bacteria to whales, has been written in the same 20 amino acids for roughly four billion years. Ec19 runs on 19.

The researchers used AlphaFold 2, ESM2, MSA Transformer, and other AI design tools to redesign 21 ribosomal proteins so they could function with valine in place of isoleucine. Of 36 essential genes initially tested, 22 swaps proved lethal and 17 were tolerated. The final strain grew at 60 to 90 percent the rate of unmodified E. coli and remained stable across more than 400 generations. The work probes what life before the last universal common ancestor may have looked like, when fewer amino acids were likely in use. The genetic code, one of biology's deepest invariants, is now editable.

What the Text says

The first work given to a human in Scripture is not building, fighting, or worshipping. It is naming.

Genesis 2:19-2019Out of the ground Yahweh God formed every animal of the field, and every bird of the sky, and brought them to the man to see what he would call them. Whatever the man called every living creature, that was its name.20The man gave names to all livestock, and to the birds of the sky, and to every animal of the field; but for man there was not found a helper suitable for him.

The Hebrew verb is qara, to call. It is the same verb God uses in Genesis 1 when he calls the light "day" and the darkness "night." Adam is given a participation in the same speech-act that ordered creation. He does not invent the animals. He receives them and designates them. The text is careful about the sequence. God forms. God brings. The human names what God has formed and brought.

Naming, in this frame, is the first creative work. It is also derivative work. Adam's authority over the animals begins with a recognition that they were made by someone else and given to him to know.

The 20 amino acids are, in a strict sense, unnamed. They have chemical labels and three-letter abbreviations, but the alphabet itself was never authored by anyone in the room. It was given. Editing that alphabet, with tools that can hold tens of thousands of structural constraints at once, is a kind of naming the tradition has not seen before. The question the text raises is not whether to do it. It is who the namer understands himself to be.

The reflection

The Christian tradition has always had room for science. It has been less comfortable with the moment when a tool arrives that can do something the tradition never imagined a tool could do.

The 20 amino acids were not chosen by a committee. They were inherited. So is the brain that designed Ec19. So is the hand that typed the code. The new strain does not change what kind of creature is doing the work. It only makes the work more visible.

Adam looked at what had been formed, opened his mouth, and called it something. The work has continued without interruption since.