七鳃鳗的文献研究摘要 / Publication research summaries · 3 entries
中文内容为资料集译写。每条说明所依据的摘要或正文范围。 / Chinese text is prepared for this collection. Summary evidence is identified for each entry.
Nature全文 PDF七鳃鳗的 Hox 基因与颌的演化
Lamprey Hox genes and the evolution of jaws
Nature · 2004
依据已查看的本地出版物正文片段概括。
Summary based on the inspected sections of the downloaded publication.
主要发现 Key findings
对日本七鳃鳗 Hox 基因的分析未发现第一咽弓普遍表达 Hox6，挑战了此前将此表达模式与无颌状态直接关联的解释。
Analysis of Japanese lamprey Hox genes did not find general Hox6 expression in the first pharyngeal arch, challenging an earlier direct link between that expression pattern and jawlessness.
结论 Conclusions
单一七鳃鳗物种的表达结果不能直接概括整个类群，也不能单独解释颌的起源。
Expression in one lamprey species cannot automatically represent the entire group or alone explain jaw origins.
Science仅摘要 Abstract only上皮与间充质相互作用的异位转移与脊椎动物颌的演化
Heterotopic shift of epithelial-mesenchymal interactions in vertebrate jaw evolution.
Science (New York, N.Y.) · 2002
摘要解读依据已查看的索引作者摘要；如已保存全文，可用于进一步阅读。
Summary based on the inspected indexed author abstract; archived full text, when available, is provided for further reading.
主要发现 Key findings
鸡与七鳃鳗口部区域中，参与下颌弓晚期特化的基因表达模式相似，但表观直系同源的同源盒基因分布于不同的外胚间充质分区，因此基因表达对应关系并不等同于组织的解剖对应关系。
Chick and lamprey oral regions show similar expression patterns for late mandibular-arch specification genes, but apparently orthologous homeobox genes occur in different ectomesenchymal subdivisions. Molecular expression correspondence therefore differs from the anatomical correspondence of these tissues.
结论 Conclusions
作者推断，上皮与间充质相互作用的空间转移参与了颌的演化，体现保守发育基因可在不同解剖背景下重新部署。
The authors infer that a spatial shift in epithelial–mesenchymal interactions contributed to jaw evolution, illustrating how conserved developmental genes can be redeployed in different anatomical contexts.
Science仅摘要 Abstract only无颌脊椎动物适应性免疫受体的多样性与功能
Diversity and function of adaptive immune receptors in a jawless vertebrate.
Science (New York, N.Y.) · 2005
摘要解读依据已查看的索引作者摘要；如已保存全文，可用于进一步阅读。
Summary based on the inspected indexed author abstract; archived full text, when available, is provided for further reading.
主要发现 Key findings
七鳃鳗的可变淋巴细胞受体通过多步骤过程，由富亮氨酸重复序列片段组装而成。免疫后的七鳃鳗产生可溶性的抗原特异性受体，序列分析显示其潜在识别库极为庞大。
Lamprey variable lymphocyte receptors are assembled from leucine-rich-repeat cassettes through a multistep diversification process. Immunized lampreys produced soluble antigen-specific receptors, and sequence analysis indicated an extremely large potential recognition repertoire.
结论 Conclusions
无颌类和有颌类演化出本质不同的受体重排系统来实现适应性抗原识别，表明复杂免疫功能可由不同分子结构形成。
Jawless and jawed vertebrates evolved fundamentally different rearranging receptor systems for adaptive antigen recognition, demonstrating that immunological complexity can arise through distinct molecular architectures.