人类基因组编码蛋白的基因只占2% LTR retro- DNA transposons transposons 3% 8% Simple sequence repeats SINEs 3% 13% Segmental duplications 5% Misc. LINEs heterochromatin 20% 8% Misc.unique sequences 12% Protein-coding genes Introns 2% 26% Components of the Human Genome人类基因组编码蛋白的基因只占 2%