基因重组技术：打破种属壁垒的“挖墙角”和“拉邮配” 天然重组：跳跃的基因 人工重组：任何基因 Small spots: frecuent excision Large spot: late in kemel excision early n developrent kernal development Restriction Foreign DNA Vector Enzyme Fragments Restriction Enzyme Revertant: element No excision Cut excised autonomous element not Joining of Cohesive Ends Plasmid L其511 restcred in genome No product Activator E Pigment gene Excision of TE in somatic cells spot Recombinant n germ cells revertant Plasmid 转药物基因的山羊 Atryn-抗凝血 2022-3-11 32022-3-11 1 3 基因重组技术：打破种属壁垒的“挖墙角”和“拉郎配” 天然重组：跳跃的基因 人工重组： 任何基因 转药物基因的山羊 Atryn-抗凝血