BIG SURPRISE. “The 8% is nearly all regulatory sequences, DNA that governs the behavior of the 1 percent of DNA that codes for proteins…until the ENCODE project, scientists thought regulatory sequences would take up about the same amount of space as protein-coding sequences. It was a big surprise to learn that the DNA that regulates genes was eight times bigger.”
https://www.geneticliteracyproject.org/2014/08/05/how-much-of-human-dna-is-doing-something/