C - chordate 中文 - EN166

chordate n.【動物；動物學】脊索動物類。

chordless
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 發現文昌魚a二phi尸rxv基因是具有線粒體和過氧化物酶體信號特征( mitochondrialandperoxisomalsortingsignals )的抗氧化物酶基因;通過序列比對，我們把尸rxv歸為l一cys和2一cys之外的3一cys類，從而把尸rx基因家族的兩種分類方法統一了起來。
Phylogenetic analysis based on the amino acids of the ubiquitin / ribosomal fused proteins of different animals well reflected the established phylogeny of the chosen organisms , and amphioxus was branched off from chordates and formed a separate cluster with an intermediate placement between invertebrates and vertebrates in the tree 通過對ubiquitin的系統進化分析，發現文昌魚ubf80除了具有脊椎動物和無脊椎動物的特征外，還具有自己的一些獨特的特征，從分子水平上支持了文昌魚是脊索動物進化過程中的一側枝的觀點。
The sea urchin represents the first sequenced genome from the echinoderms , which are the closest known relatives of the chordates , the group that includes vertebrates , animals with spinal columns 海膽是首個被排序的棘皮動物，這是與離脊索動物（也包括有脊椎動物）最近的親屬。
Chordates are bilaterally symmetrical , triploblastic , segmented coelomates which demonstrate a deuterostomic pattern of early embryonic development 脊索動物兩側對稱、三胚層，分節的體腔，在胚胎發育的早期過程中，顯示為后口類型。
There are about 45 . 000 species of chordates , occupying marine , fresh and brackish water and terrestrial habitats 有大約45 . 000種脊索動物，它們占據著海、淡水或淡咸水和陸地的生態環境。