Isolation of taurine synthetic enzyme genes from fishes and mechanism of osmotic regulation

Cycteine亚磺酸脱羧酶(CSD)基因是从罗非鱼和黄鱼中分离得到的。此外，还进行了大比目鱼、红鱼、花鱼和黄尾鱼的基因表达分析。成功地从罗非鱼和黄鱼中分离出CSD的全长，推导的氨基酸序列同源性为88.8%，与尼罗罗非鱼和板鱼等的CSD密切相关，CSD在不同物种的肝脏和幽门盲肠中普遍表达。

Cycteine sulfinic acid decarboxylase (CSD) genes are isolated from red sea bream and yellowtail. Expression analysis was also conducted in bastard halibut, red sea bream, seabass, and yellowtail. Total length of CSD was successfully isolated from red sea bream and yellowtail and deduced amino acid seqeuences from both species showed88.8 % homology and closely associated to CSD from Nile tilapia and platy, etc. Expressionof CSD was commonly observed in liver and pyloric caecae from different species.