*The sum of “Fraction of the Human Genome (%)” totals more than 100% because mobile DNA elements are counted twice: once to show the different classes of human mobile DNA elements; and second as part of the intergenic regions and protein coding genes where they are located in introns and 3′ untranslated regions of terminal exons.
**Complete transcription units including exons and introns.
† Total length of all exons. Protein-
‡ Length of each repeat in a tandemly repeated sequence.
SOURCE: Data from International Human Genome Sequencing Consortium, 2001, Nature 409:860 and 2004, Nature 431:931.