The first group stayed in the boiling, mineral-rich vents. To survive, they kept their methionine synthesis pathway lean and mean. They used the enzyme, a rugged, ancient tool that didn't mind the heat. This lineage became the Archaic Branch , the keepers of the old ways.
One day, the seafloor quaked, opening a rift that swept Meti’s descendants into two very different worlds. Phylogenetic analysis of methionine synthesis g...
The second group was swept into the cooler, oxygen-rich upper layers of the ocean. Here, the old tools didn't work as well. Their DNA began to shift—a process of and horizontal gene transfer . They met a passing fungus and "borrowed" a more efficient sequence for the MetH enzyme, which used Vitamin B12 to speed up production. This was the Evolutionary Leap , leading to the diverse world of eukaryotes. The first group stayed in the boiling, mineral-rich vents
Millions of years later, a scientist ran a on a computer. As the digital "tree of life" flickered onto the screen, the scientist saw the two branches. One was a straight, stubborn line leading back to the vents; the other was a sprawling, chaotic bush of green and blue. This lineage became the Archaic Branch , the
