These tsv files are from this paper:
 - https://www.frontiersin.org/articles/10.3389/fimmu.2017.00537/full
if you click on the doi in the abstract the link is broken, but if you google the link after a couple clicks you get here:
  - https://figshare.com/articles/Mutability_profiles/3511083/1
and the download link at the top gives me three .txt files (really tsv)
Make sure to grab v2!

