https://littlebsbigc.wordpress.com/2015/05/21/a-10-year-sentence/ Day 142 has 44 protein-coding genes (browser view) including ESR1 (estrogen receptor 1).
The role of the estrogen receptor in many breast cancers led to the development of tamoxifen as an anti-cancer drug.
Click here to see all 8540299 letters of Day 142 with ESR1 underlined.