澳科学家发现蜜蜂会识别1到4四个数字

新华网北京2008年10月26日专电澳大利亚科学家最近通过研究发现，蜜蜂会识别1到4这4个数字。路透社26日援引澳大利亚广播公司的报道说，澳大利亚昆士兰大学的一组科学家与瑞典科学家合作，将标注了1至5数字的纸条放人一个管道内，然后在其中一个纸条上涂上花蜜，把蜜蜂放到管道内，观察它们的行为。     

Identification and characterization of an epididymis-specific gene,Ces7

Carboxylesterases （CEs） represent a multigene family of serine-dependent enzymes. Male-dependent CEs are over-expressed in the male reproductive tract of different animal species （bivalve mollusks, fruit-flies, and mammals）. Here, a novel rat epididymis-specific gene named Ces7 was cloned and characterized. It was a novel member of CE family, which was mainly expressed and secreted to the lumens of the corpus and cauda epididymis. CES7 protein was highly glycosylated as other mammalian CEs. Furthermore, Ces7 increased with age growth until sex maturation and then maintained at high level. CES7 might be one of the major CEs in male reproductive tract and contribute to the sperm fertilization.