We wanted to know what caused the extraordinarily
#LongTermTrends we previously saw: in
#IntrinsicStructuralDisorder and in the degree to which hydrophobic
#AminoAcids are clustered, as a function of the time elapsed since a Pfam domain originated.
https://elifesciences.org/articles/57347 2/11

Universal and taxon-specific trends in protein sequences as a function of age
Ancient protein domains remain shaped by amino acid availability during early life, while young animal proteins are shaped by a need for high intrinsic structural disorder.
eLife