Researchers generate the first complete, gapless sequence of a human genome
Genome sequence and DNA illustration .Scientists have published the first complete, gapless sequence of a human genome, two decades after the Human Genome Project produced the first draft human genome sequence. According to researchers, having a complete, gap-free sequence of the roughly 3 billion bases in our DNA is critical for understanding the full spectrum of human genomic variation and for understanding the genetic contributions to certain diseases.
The now-complete human genome sequence will be particularly valuable for studies that aim to establish comprehensive views of human genomic variation, or how people's DNA differs. Such insights are vital for understanding the genetic contributions to certain diseases and for using genome sequence as a routine part of clinical care in the future. Many research groups have already started using a pre-release version of the complete human genome sequence for their research.
The cost of sequencing a human genome using"short-read" technologies, which provide several hundred bases of DNA sequence at a time, is only a few hundred dollars, having fallen significantly since the end of the Human Genome Project. However, using these short-read methods alone still leaves some gaps in assembled genome sequences.
"Using long-read methods, we have made breakthroughs in our understanding of the most difficult, repeat-rich parts of the human genome," says Karen Miga, Ph.D., a co-chair of the T2T consortium whose research group at the University of California, Santa Cruz is funded by NHGRI."This complete human genome sequence has already provided new insight into genome biology, and I look forward to the next decade of discoveries about these newly revealed regions.
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