Trees were generated based on multiple alignment using IQ-TREE, a phylogenomic inference software. ModelFinder was used to determine the best protein model for the trees (LG+G4 for the tree in Figure 1C and LG+R8 for the tree in Figure S1). Two bacterial species, Escherichia coli and ...
They identified two different types of neurons -- one that senses warmth and the other coolness -- that act on the same protein in the intestine, telling it to either slow down or speed up the aging process. When the cool-sensing neuron detects a drop in temperature, it sets off a chai...
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