However , amphioxus ubf80 also showed some unique characters such as its amino acid residues at sites 39 , 54 , 63 and 74 in the cep . it appears that amphioxus not only represents an organism tr ansitional from invertebrates to vertebrates in phylogeny but also a possible diverged form radiated from the chordate ancestor at early chordate evolution . the possibility that some mutations in ub genes have taken place in different lines early at the divergence of plants and animals is also discussed 发现文昌鱼a二phi尸rxv基因是具有线粒体和过氧化物酶体信号特征( mitochondrialandperoxisomalsortingsignals )的抗氧化物酶基因;通过序列比对，我们把尸rxv归为l一cys和2一cys之外的3一cys类，从而把尸rx基因家族的两种分类方法统一了起来。
The skin mucus showed agglutinating activity against all human a , b and o , rabbit , chick , grass carp and toad erythrocytes tested . rabbit erythrocytes , however , invariably possessed the highest titer among the cells derived from different animals including human . in addition , there is no blood - group specificity toward human erythrocytes 实验结果表明，文昌鱼体表粘液中凝集素对7种动物的血细胞：人abo血细胞、兔血细胞、鸡血细胞、草鱼血细胞和蟾蜍血细胞均有凝集作用，其中对兔的血细胞凝集效价最高，对人abo血型凝血作用无血型专一性。
