Sequence alignment shows that the fragment of pcr product showed some identities to the masp gene of xenopus laevis , branchiostoma belcheri , the trypsin gene in litopenaeus vannamei and the serine protease gene in aurelia aurita Pcr反应产物基因片段大小为630bp ，序列比较结果表明， pcr克隆产物与爪蟾、文昌鱼的masp基因，虾、水母等的胰蛋白酶基因和丝氨酸蛋白酶基因都有一定的同源性。
An important feature of meiotic maturation is an extensive network of feedback signalling ( mostly downstream of mpf activation ) , which is responsible for the generation of an all - or - none response ensuring that the oocyte completes meiotic progression 总的来说，爪蟾卵成熟过程受到复杂的相互作用的激酶网络的调节，这样的反馈网络使得爪蟾卵成熟成为一个“ all - or - none ”的过程。
Oocyte maturation involves the activation of various signal trans - duction pathways that converge to activate maturation - promoting factor ( mpf ) ; this is a key activity that catalyses entry into m - phase of meiosis i and meiosis ii 在爪蟾卵中有大量未被激活的cdc2 - cyclinb复合物，称为pre - mpf ， pre - mpf在tyr15位脱磷酸变成活性mpf ，起到这个作用的磷酸酶是cdc25 ， cdc25的活性通过磷酸化和细胞位置进行调控。
The cadherin repeated domains of bt - r3 protein share high homology with the cadherin domains from african clawed frog ( xenopus laevis ) and e - cadherin ( epithelial ) from mouse ( mus musculus ) . so , the 3rd structure of the cadherin repeated domains of bt - r3 protein should be similar to these domains Bt - r3受体蛋白的钙粘蛋白结构域分别与非洲爪蟾( xenopuslaevis )的钙粘蛋白胞外结构域和小鼠( musmusculus )的上皮钙粘蛋白胞外结构域有很高的同源性。
At first , the vrl - cdna plasmids were transformed into tg1 r . coli to enlarge vrl - cdna ; then the plasmids were extracted and cut off with enzymes ; subsequently , vrl - cdnas were transcribed into vrl - inrna by t7 or sp6 polymerase in vitro , following vrl - mrnas were injected into xenopus laevis oocyte to express into vr1 receptor protein ; at the end the vrl + - oocytes were tested by double electode voltage clamp 这项实验中，我们首先将大白鼠vr1 - cdna质粒转入大肠杆菌中进行扩增，然后提取质粒并酶切，然后在体外转录成vr1 - mrna ，接着将vr1 - mrna注射到非洲爪蟾卵母细胞中表达为蛋白质受体，建立了实验模型细胞，最后用双微电极电压钳检测此模型细胞。
Magainin is the skin secretion product of batrachia under the eriviroment pressure , which can be used to accelerate the fusion rate of wound and resist the infection . it can inhibit the growth of bacteria and fungus with the lowest concentration ; protegrin is isolated from porcine leukocyte hi 1993 and is useful as antiviral agents Magainins是爪蟾的皮肤在一定的环境压力下分泌出的抗感染和促进伤口愈合的成分，低浓度便可抑制许多细菌和真菌生长； protegrin是1993年从猪的中性白细胞中分离得到，研究发现它具有抗爱滋病毒的功能。
