玉米（Zea mays L.）过氧化物酶编码基因px和冷调控蛋白编码基因cld的物理定位

过氧化物酶是植物抗病过程中的关键酶,也参与植物抗低温胁迫以及一些正常的植物生长发育生理过程。冷调控蛋白是植物抗低、高温的重要蛋白。近年的研究表明植物抗病、某些正常生长发育过程。冷调控蛋白是植物细胞程序性死亡有关。以玉米自效系黄早四为材料,采用生物素标记,利用原位杂效技术绎玉米中过氧化物酶和冷调控蛋白编码基因ｐｘ与ｃｌｄ进行了原位杂效定位,ＤＡＢ和荧光检测得到了一致的结果。在２号和７号染色体长臂同时     

A plasmid-borne O-antigen chain length determinant and its relationship to other chain length determinants

Abstract We identify a function-controlling O antigen chain length for a plasmid-borne gene, cld _pHS-2 harboured by Flexneri strains of Escherichia coli known to cause reactive arthritis. The predicted amino acid sequence of the gene product is very similar to those of other cld genes and that of fepE , thought to be part of the enterobactin iron uptake system of E. coli . The predicted proteins are compared with rfb -associated chain length determinants as a family of related genes