Octopuses change on the molecular level to handle frigid water.
. DNA holds the instructions to make proteins, one of the key building blocks of the body. But it relies on messenger RNA — or mRNA — to shuttle those instructions out of the cell nucleus and to the proteins responsible for building other proteins.
This fury of editing started in the space of only a few hours — probably changing the behavior of octopus brains. For instance, the team found that mRNA editing caused kinesin, a protein that shuttles cargo in nerve cells, to slow its movement. Why this happens is unknown, but it might help the cargo-carrying protein harmonize its movements with other processes in the cell if they too become sluggish, Rosenthal says.
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