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The Genom of Homo sapiens.pdf

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HUMAN VS. CHIMP CHROMOSOME COMPARISON 459Figure 3. Sequence alignment <strong>of</strong> upstream regions <strong>of</strong> IFNAR2 gene. Identical bases are shown by *. Nonidentical bases are shownby open gothic, and deleted region is shown by underline. Arrows show possible regulatory elements.this study came from the Ka/Ks study showing that morethan 5% <strong>of</strong> genes are relatively free from constraint, andsome <strong>of</strong> them have been positively selected. <strong>The</strong> number<strong>of</strong> genes examined by the present study is too small todraw general conclusions, but there is the suggestion thatsome tissue-specific genes may play a positive role in establishingspecies-specific phenotypes.In summary, the present study revealed a complex set<strong>of</strong> genetic differences between human and chimpanzee.Further experimental examination is required to say exactlywhat biological differences are caused by these geneticdifferences, but these data suggest that the biologicalconsequences derived from the genetic differencesmay be more complicated than previously speculated.ACKNOWLEDGMENTSWe are grateful to T. Ito, T. Kawagoe, T. Kojima, X.Son, A. Beck, K. Borzym, S. Gelling, V. Gimmel, K.Heitmann, A. Kel, S. Klages, N. Lang, I. Mueller, M.Sontag, R. Yildirimman, Jean Wickings, Cornelia Baumgart,Oliver Mueller, T.T. Liao, H. Tsai, Y. Huang, Y.Liu, and all the technical staffs <strong>of</strong> the contributinggenome centers. This work was supported in part by aSpecial grant from RIKEN <strong>Genom</strong>ic Sciences Center andGrant-in-Aid for Scientific Research on Priority Areas“<strong>Genom</strong>e Science” from the Ministry <strong>of</strong> Education, Culture,Sports, Science and Technology, Japan; <strong>The</strong> Ministry<strong>of</strong> Education and Research, Germany; <strong>The</strong> ChineseInternational Science and Technology Cooperation Project,Ministry <strong>of</strong> Science and Technology, China; <strong>The</strong>Chinese High-Tech Research and Development Program,Shanghai Commission for Science and Technology; and<strong>The</strong> National Research Program for <strong>Genom</strong>ic Medicine<strong>of</strong> National Science Council, Taiwan.REFERENCESBailey J.A., Yavor A.M., Viggiano L., Misceo D., Horvath J.E.,Archidiacono N., Schwartz S., Rocchi M., and Eichler E.E.2002. Human-specific duplication and mosaic transcripts:<strong>The</strong> recent paralogous structure <strong>of</strong> chromosome 22. Am. J.Hum. Genet. 70: 83.Britten R.J. 2002. Divergence between samples <strong>of</strong> chimpanzeeand human DNA sequences is 5%, counting indels. Proc.Natl. Acad. Sci. 99: 13633.Carrol S.B. 2003. Genetics and making <strong>of</strong> <strong>Homo</strong> <strong>sapiens</strong>. Nature422: 849.Chen F.-C. and Li W.-H. 2001. <strong>Genom</strong>ic divergence betweenhumans and other hominoids and the effective population size<strong>of</strong> the common ancestor <strong>of</strong> humans and chimpanzees. Am. J.Hum. Genet. 68: 444.Enard W., Khaitovich P., Klose J., Zöllner S., Heissig F., GiavaliscoP., Nieselt-Struwe K., Muchmore E., Varki A., RavidR., Doxiadis G.M., Bontrop R.E., and Pääbo S. 2002. Intraandinterspecific variation in primate gene expression patterns.Science 296: 340.Frazer K.A., Chen X., Hinds D.A., Pant K., Patil N., and Cox

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