http://michiganlakes.com/lake-blog/recreation-a-vacation/330-construction-ahead.html Day 192 has 31 protein-coding genes (browser view) including NBN (nibrin).
When DNA suffers double-stranded breaks, a repair complex recognizes the break and recruits proteins to fix the break. Nibrin is part of the repair complex.
Click here to see all 8537567 letters of Day 192 with NBN underlined.