现代媒体在体育舞蹈律动教学中的运用

将录音、录像、摄像及网络等现代媒体与传统教学方式结合起来，可使教学过程最优化。该文结合作者的体育舞蹈律动教学实践，论述了现代媒体在体育舞蹈律动教学各环节中的作用，并阐明了其具体的教学过程。     

两种洗衣粉对泥鳅血清Pod同工酶表达的影响

为探讨洗衣粉对泥鳅血清同工酶表达的影响，选择两种不同的洗衣粉（代号为AJ、BJ）为材料，采用SDS-聚丙烯酰胺凝胶（PAGE）电泳法研究洗衣粉对泥鳅血清过氧化物酶（POD）表达的影响．结果表明两种洗衣粉在不同浓度染毒下均使泥鳅血清过氧化物酶（POD）同工酶的酶活性变化显著，两种洗衣粉对泥鳅血清同工酶表达具有一定的影响，且不同洗衣粉对其影响程度不同．     

毛腿鼠耳蝠Myotis fimbriatus不同组织酯酶同工酶的比较

采用聚丙烯酰胺不连续凝胶垂直板活性电泳,分析了毛腿鼠耳蝠的心脏、肝脏、肾脏、胸肌、肺、胃、小肠、舌8种组织的酯酶.结果表明:毛腿鼠耳蝠8种组织的酯酶同工酶存在差异,其分布和活性具有明显的组织特异性,与器官或组织所执行的功能有关.     

绿色荧光蛋白标记的NTE活性域表达载体的构建及表达

利用含有特定限制性内切酶识别位点的引物,通过聚合酶链式反应扩增出人神经病靶标酯酶活性域的编码序列,经T载体克隆测序正确后,双酶切回收特异片段定向插入到增强型绿色荧光表达载体pEGFP-N3中,通过酶切反应鉴定,构建了绿色荧光蛋白标记的神经病靶标酯酶活性域的融合表达载体pNEST-EGFP.采用脂质体转染的方法将其转染到人神经瘤母瘤细胞SH-SY5Y中,用荧光显微镜观察发现神经病靶标酯酶活性域分布于细胞质中,而且没有导致内质网膜的聚集,表明表达载体成功构建和表达.     

Characterization of carrot pectin methylesterase

The most alkaline form of pectin methylesterase was purified from ripe carrot roots and used for structural analysis. Determination of an N-terminal blocking group and of the primary structure allowed comparisons with other forms, and facilitated crystallographic determination of the three-dimensional structure. The mature enzyme has 319 residues and the N-terminal blocking group was shown to be a pyroglutamyl residue derived from a glutaminyl cyclization. Few other methylesterases have been isolated and assigned to exact mature forms, and together with the present enzyme, only two have been analyzed in three-dimensional structure. However, comparison of 39 forms, mainly from GenBank data, reveals clear relationships and identifies sub-groups of this enzyme type, deviating in structure but centering around two functionally important and conserved Asp residues at positions 136 and 157 in the carrot enzyme. Received 2 January 2002; accepted 4 January 2002     

泥鳅和大鳞副泥鳅酯酶同工酶的比较研究

采用不连续聚丙烯酰胺凝胶电泳技术分析了泥鳅和大鳞副泥鳅的性腺、脑、肾、肝和心脏五种组织的酯酶同工酶。结果表明 :在不同器官中酯酶同工酶存在明显的组织特异性 ;比较泥鳅和大鳞副泥鳅酯酶同工酶它们的酶谱相似外 ,在它们的各个相应组织之间也显示出差异 ,表明酯酶同工酶在泥鳅种内具有一定的差异。这对于探讨泥鳅不同种之间的亲缘关系将是一个很有用的手段。本文认为肝脏是研究泥鳅与大鳞副泥鳅种群生化遗传结果的理想材料     

大麦、油菜的抗耐病性与过氧化物酶同工酶的关系

利用过氧化物酶同工酶分析比较了上海地区大麦抗、感黄花叶病的品种和油菜耐、感菌核病的品种间的酶谱差异。结果表明,两类作物的抗耐病性在酶谱上呈现相同趋势。感病品种的酶带数量和强度要高于抗耐病品种。试验显示,过氧化物酶同工酶分析可作为大麦、油菜抗病育种中的一个鉴定手段予以利用。     

嗜热酯酶EstTs1的远源三维结构模建及分子对接

利用Phyre网络服务器,构建嗜热酯酶EstTs1的三维结构,并通过分子动力学优化构型,得到了可靠的构型.分子对接研究表明,p-硝基苯基丁酸酯是EstTs1的最适底物,其大小正适合EstTs1的活性口袋.Thr111是底物与酶结合的重要残基,与底物形成了氢键; Ser85是重要的催化残基.     

Cycles of juvenile hormone esterase activity during the juvenile hormone-driven cycles of oxygen consumption in pupal diapause of flesh flies

Summary During diapause O₂ consumption in fly pupae is a cyclic event (4-day periodicity at 25°C) driven by cycles of juvenile hormone activity. Levels of juvenile hormone esterase activity change systematically during the cycle, with highest activity observed at the nadir of the O₂ consumption cycle.Supported in part by grant 88-37153-3473 from the USDA Competitive Grants Office and grant 23-088 from the USDA Forest Service. Thanks to Dr Ming Tu Chang for her helpful advice.