Effect of Fertilizer Diammonium Phosphate on Liver,Kidney and Muscle 5-Nucleotidase Activity of Fresh Water Teleost Fish Clarias batrachus

The toxic effect of fertilizer Diammonium phosphate resulted in alterations of 5'-Nucleotidase activity of tissues liver, kidney and muscles offish C. batrachus at varying intervals and exposures. Alterations in 5'-Nuclcotidase activity of body organs gave an idea of the toxicity caused by the fertilizer. Thus the enzyme 5'-Nucleotidase can be used to monitor the pollution in aquatic ecosystem.

淡水瓦氏雅罗鱼基因文库的构建和抗冻蛋白基因同源序列的筛选

南、北极海域中的一些鱼类,在秋冬季节,它们的血液中含有一些能降低其冰点的蛋白质,分别为抗冻糖蛋白(AFGP)和不含糖的抗冻蛋白或抗冻多肽(AFP)。现在,人们已经分离纯化了多种这样的抗冻糖蛋白、抗冻蛋白及多肽,并克隆了编码它们的基因。Fletcher等将北美黄盖鲽抗冻蛋白(AFP)注入虹鳟鱼(Sairdnerii)后改善了后者的抗冻性能,并将黄盖鲽AFP基因转入了大西洋鲑鱼Atlantic salmon中。