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Proceedings of the Japan Academy, Ser. B, Physical and Biological Sciences

Vol. 85 No. 2 (2009)

  Vol. 85 No. 2 (2009)
Perpendicular magnetic recording —Its development and realization—
Shun-ichi IWASAKI
Proc. Jpn. Acad., Ser. B, Vol. 85, 37-54 (2009) [abstract] [PDF]
Evolution of non-coding regulatory sequences involved in the developmental process: Reflection of differential employment of paralogous genes as highlighted by Sox2 and group B1 Sox genes
Yusuke KAMACHI, Makiko IWAFUCHI, Yuichi OKUDA, Tatsuya TAKEMOTO, Masanori UCHIKAWA and Hisato KONDOH
Proc. Jpn. Acad., Ser. A, Vol. 85, 55-68 (2009) [abstract] [PDF]
The origin of the Japanese race based on genetic markers of immunoglobulin G
Proc. Jpn. Acad., Ser. A, Vol. 85, 69-82 (2009) [abstract] [PDF]
Cover Illustration

Two enhancers of the Sox 2 gene in action visualized in a developing chicken embryo

Functional genomics have gained its power, when regulatory sequences of genes, largely embedded in non-coding sequences of a genome, became accessible to functional assessment.  One breakthrough was made by H. Kondoh’s group, who developed a method to systematically screen for the regulatory sequences utilizing electroporation technique in chicken embryos.  The method assures gain- and loss-of function of certain genes in living embryos, and has now been used world wide in the field of developmental biology. Kondoh’s group has successfully applied this method to investigate regulatory sequences of genes involved in developmental processes. The cover illustration represents three developmental stages (stage 6, 8 and 11) of the same electoporated- embryo that developed under a culture condition, and show activities of two enhancers N-1 (green fluorescence of EGFP) and N-2 (red fluorescence of mRFP1) that regulate Sox2 expression in the forming CNS in the posterior and anterior territories, respectively, of an embryo.  Fluorescent images are overlaid on darkened bright-field images of the embryo.

Harukazu Nakamura
Department of Molecular Neurobiology,
Graduate School of Life Sciences and Institute of Development,
Aging and Cancer, Tohoku University

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