http://www.bioscience.org/2006/v11/af/1894/fulltext.php?bframe=figures.htm Day 194 has 28 protein-coding genes (browser view) including ODF1 (outer dense fiber of sperm tails 1).
It is the primary protein of the outer part of sperm tails that makes them springy and resilient.
Click here to see all 8537566 letters of Day 194 with ODF1 underlined.