Without Air

The parasite keeps a small room in the gut where oxygen doesn't go.

Fifty-nine proteins in that room — twenty-seven new to the list, thirty-four still unnamed.

A man at Charles University says there is metabolism we overlooked because it runs without our air.

Across five parasites and a plant: eight thousand six hundred proteins, three thousand families. Thirty-three of those families live in the pathogens and not in us.

The bacterium that stayed two billion years ago still keeps its own DNA. We knew the rooms of humans and yeast. These had been running the whole time where the catalogue didn't look.