https://en.wikipedia.org/wiki/Tight_junction#/media/File:Cellular_tight_junction-en.svg Day 207 has 33 protein-coding genes (browser view) including TJP2 (tight junction protein 2).
TJP2 is found at the tight junctions which are needed for forming waterproof seals in the body, most importantly within the liver and kidney.
Click here to see all 8649669 letters of Day 207 with TJP2 underlined.