内蒙古陆生脊椎动物地理区划

内蒙古共分布有陆脊椎动物６１０种,在僵 理区划中划归古北界;东亚亚界、中亚亚界;东北区、华北区、蒙新区、大兴安岭区区、松辽平原亚区、黄土高原亚区、东部草原亚区、西部荒漠亚区,根据动物区系演化,现代生态环境及动物分布特征,我们进一步划为１２个动物地理省;大兴安岭北省、大兴安岭省、松辽平原省、燕山北部省、大青山以南丘陵平原省、大兴安岭西麓草甸草原省,内蒙古高原中温型草原省、洋多斯暖温型草原省,阴山以北     

粗糙脉孢菌产黑色素条件优化及黑色素物理特性研究

优化了粗糙脉孢菌(Neurospora crassa)AS3．1602生产黑色素的条件，结果表明，在葡萄糖0．5g/L,(NH4)2SO4 8g/L,NaCl3 g/L,CaCl2 0.1g/L、酪氨酸取饱和浓度时，有相对高的产量．对所产黑色素进行了分离纯化，并研究了其理化性质．     

Vertebrate Smoothened functions at the primary cilium

The unanticipated involvement of several intraflagellar transport proteins in the mammalian Hedgehog (Hh) pathway has hinted at a functional connection between cilia and Hh signal transduction. Here we show that mammalian Smoothened (Smo), a seven-transmembrane protein essential for Hh signalling, is expressed on the primary cilium. This ciliary expression is regulated by Hh pathway activity; Sonic hedgehog or activating mutations in Smo promote ciliary localization, whereas the Smo antagonist cyclopamine inhibits ciliary localization. The translocation of Smo to primary cilia depends upon a conserved hydrophobic and basic residue sequence homologous to a domain previously shown to be required for the ciliary localization of seven-transmembrane proteins in Caenorhabditis elegans. Mutation of this domain not only prevents ciliary localization but also eliminates Smo activity both in cultured cells and in zebrafish embryos. Thus, Hh-dependent translocation to cilia is essential for Smo activity, suggesting that Smo acts at the primary cilium.     

脊椎动物性别决定机制的研究进展

分别以哺乳动物和爬行动物为例介绍了脊椎动物性别决定的两种主要类型的研究进 展,并推测两种性别决定机制在分子水平上可能是一致的。     

Bony Fish Fossil Reveals New Clue for Modern Vertebrate Origins

Chinese scientists＇ discovery of an intact and ancient fish fossil might bring the search for modern vertebrate origins out of the Devonian age （416 to 359 million years ago） and into the preceding period.     

Vertebrate radiations of the Jehol Biota and their environmental background

Significant progress has been made in recent years in the studies of various groups of the Jehol Biota, particularly concerning the origin of birds and their flight as well as the evolution of Early Cretaceous birds, dinosaurs,mammals, insects and flowering plants. As a result,the Jehol Biota has become well known to both the scientific