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The Genom of Homo sapiens.pdf

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46 RIETHMAN ET AL.leles are those where DNA from entire half-YACs hasbeen sequenced. Most subtelomeric variants have yet tobe characterized, cloned, and sequenced in their entirety,and perhaps many are still undetected. This gap in our understanding<strong>of</strong> the structure and sequence content <strong>of</strong> thesedynamic and rapidly evolving chromosome regions mustbe filled in order to complete the human genome sequenceand to develop reagents for understanding itsfunction and evolution. Sequencing <strong>of</strong> representatives <strong>of</strong>all common large-scale variants <strong>of</strong> chromosome ends willprovide a comprehensive picture <strong>of</strong> the occurrence andfrequency <strong>of</strong> different subtelomeric length variants in humanpopulations, and will permit development <strong>of</strong> sequence-basedmarker sets for more facile analysis <strong>of</strong> variantregions using PCR-based methods. <strong>The</strong>se aims areachievable and essential for understanding the structureand function <strong>of</strong> the human genome.ACKNOWLEDGMENTSWe thank the members <strong>of</strong> the International Human<strong>Genom</strong>e Sequencing Consortium, many <strong>of</strong> whom participatedin the sequencing <strong>of</strong> subtelomeric regions. BobMoyzis, Jonathan Flint, and William Brown collaboratedor provided reagents for the earlier stages <strong>of</strong> this work,and Uma Mudunuri provided technical support. John Ruxand the Wistar Bioinformatics Facility provided programmingand computational support. Financial supportwas provided by National Institutes <strong>of</strong> Health grants HG-00567 and CA-25874, and by the Commonwealth UniversalResearch Enhancement Program, PennsylvaniaDepartment <strong>of</strong> Health.REFERENCESAltschul S.F., Madden T.L., Schäffer A.A., Zhang J., Zhang Z.,Miller W., and Lipman D.J. 1997. Gapped BLAST and PSI-BLAST: A new generation <strong>of</strong> protein database search programs.Nucleic Acids Res. 25: 3389.Azzalin C.M., Nergadze S.G., and Giulotto E. 2001. Human intrachromosomaltelomeric-like repeats: Sequence organizationand mechanisms <strong>of</strong> origin. Chromosoma 110: 75.Bailey J.A., Gu Z., Clark R.A., Reinert K., Samonte R.V.,Schwartz S., Adams M.D., Myers E.W., Li P.W., and EichlerE.E. 2002. Recent segmental duplications in the humangenome. Science 297: 1003.Baird D.M., Rowson J., Wynford-Thomas D., and Kipling D.2003. 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