Common variants at 12q15 and 12q24 are associated with infant head circumference

To identify genetic variants associated with head circumference in infancy, we performed a meta-analysis of seven genome-wide association studies (GWAS) (N = 10,768 individuals of European ancestry enrolled in pregnancy and/or birth cohorts) and followed up three lead signals in six replication studies (combined N = 19,089). rs7980687 on chromosome 12q24 (P = 8.1 × 10(-9)) and rs1042725 on chromosome 12q15 (P = 2.8 × 10(-10)) were robustly associated with head circumference in infancy. Although these loci have previously been associated with adult height, their effects on infant head circumference were largely independent of height (P = 3.8 × 10(-7) for rs7980687 and P = 1.3 × 10(-7) for rs1042725 after adjustment for infant height). A third signal, rs11655470 on chromosome 17q21, showed suggestive evidence of association with head circumference (P = 3.9 × 10(-6)). SNPs correlated to the 17q21 signal have shown genome-wide association with adult intracranial volume, Parkinson's disease and other neurodegenerative diseases, indicating that a common genetic variant in this region might link early brain growth with neurological disease in later life.     

On the glutamine and γ-aminobutyric acid contents of various regions of the cat brain

Résumé Les auteurs ont déterminé par la méthode de la chromatographie à deux dimensions, la teneur en glutamine et en acide -aminobutyrique des différentes parties du cerveau du chat. La concentration la plus élevée de l'acide -aminobutyrique a été trouvé dans l'hypothalamus, tandis que celle de la glutamine a été constatée dans le noyau caudé. Les concentrations les plus basses de ces deux protéines apparaissent dans la substance blanche du cerveau.     

"数字地球"时代的我国西部可持续发展

“数字地球”作为新世纪信息时代的新目标和制高点,必将在西部大开发战略的实施过程中起到至关重要的作用。从“数字地球”的基本概念出发,应用“数字地球”的理论和技术,阐述了“数字地球”技术对西部大开发的战略意义和应用方向,为我国西部地区的可持续发展提供了新的思路和技术方法。     

6个氨基酸小C肽人胰岛素原类似物基因的构建和表达

用片段置换法，从在Ｃ肽两端具有酶切位点的双突人胰岛素原因中，将Ｃ肽基因替换成含Ａｒｇ－Ａｒｇ－Ｇｌｙ－Ｓｅｒ－Ａｒｇ－Ｌｙｓ６个氨基酸小Ｃ肽基因。将这个小Ｃ肽岛素原类似物基因重组到具有Ｔａｃ启动子的质粒中，并与部分牛凝乳酶原基因融合，在Ｅ．ｃｏｌｉ中得到了高效表达。表达的ＢＣ＇Ａ融合蛋白占菌体总蛋白的１６％。表达产物以包含体形式存在，经ＣＮＢｒ裂解及磺酸，再经复性后，具有对胰岛素的放射免疫活性。