https://en.wikipedia.org/wiki/Cytochrome_P450#/media/File:CytP450Oxidase-1OG2.pngDay 298 has 91 protein-coding genes (browser view) including CYP1A1 and CYP1A2 (cytochrome P450 family 1 subfamily A members 1 and 2).
The cytochromes are important proteins that metabolize drugs, hormones, and fats. The CYP1A1 and CYP1A2 genes are turned on and off by Day 147 (7p21.1-7p15.3): AHR, a smoke detector with evolutionary implications.
Click here to see all 8499266 letters of Day 298 with CYP1A1 underlined.