对自然杂志发表的一篇文章的评注

最近自然杂志(Nature,432:383—386,2004)发表了Chengetal.的文章,首次报道了胡氏贵州龙的生育模式、性双形和可能胎生的证据,这无疑是非常重要的,但认为产胡氏贵州龙的竹杆坡组的时代为中三叠世,这与近年来牙形刺的研究结果不符。牙形刺的研究已充分证明竹杆坡组的时代为晚三叠世的早期(卡尼期)(王成源等,1998;Chen&Wang,2002),比以前认为的时代要晚出现大约一千万年。     

Comment to Shinohara et al. (1991) FEBS Letters 293, 173-174. The uncoupling protein is not expressed in rat liver.

Using Northern blot analysis, immunoblotting with purified antibodies and Polymerase Chain Reaction analysis, we were unable to detect the Uncoupling Protein-UCP or its mRNA in liver of control, cold-exposed or newborn rats. The unique expression of this protein in brown adipocytes was confirmed. These data refute the surprising recent report on UCP expression in rat liver (Shinohara (1991) FEBS Lett. 293, 173-174). Moreover we report that the hybridization signal obtained by these authors is probably non-specific and due to the 3' non-coding domain of the UCP cDNA probe.