<mxfile host="app.diagrams.net"><diagram name="roadmap"><mxGraphModel dx="1200" dy="800" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="1200" pageHeight="800" math="0" shadow="0">
  <root>
    <mxCell id="0" />
    <mxCell id="1" parent="0" />
    <mxCell id="node1" value="研究问题：大肠杆菌甲羟戊酸途径表达不平衡，产量低、代谢负担重" style="rounded=1;whiteSpace=wrap;html=1;fillColor=#dae8fc;strokeColor=#6c8ebf;fontSize=14;fontStyle=1;arcSize=8;verticalAlign=middle;align=center;" vertex="1" parent="1">
      <mxGeometry x="40" y="40" width="340" height="64" as="geometry" />
    </mxCell>
    <mxCell id="node2" value="策略：模块化克隆载体系统，平衡基因表达，定位限速步骤" style="rounded=1;whiteSpace=wrap;html=1;fillColor=#d5e8d4;strokeColor=#82b366;fontSize=14;fontStyle=1;arcSize=8;verticalAlign=middle;align=center;" vertex="1" parent="1">
      <mxGeometry x="40" y="162" width="340" height="64" as="geometry" />
    </mxCell>
    <mxCell id="node3" value="关键改造1：快速克隆系统+启动子替换（lacUV5）与密码子优化" style="rounded=1;whiteSpace=wrap;html=1;fillColor=#fff2cc;strokeColor=#d6b656;fontSize=13;fontStyle=1;arcSize=8;verticalAlign=middle;align=center;" vertex="1" parent="1">
      <mxGeometry x="40" y="284" width="340" height="64" as="geometry" />
    </mxCell>
    <mxCell id="node4" value="关键改造2：基因剂量实验，鉴定MK与ADS为限速酶" style="rounded=1;whiteSpace=wrap;html=1;fillColor=#fff2cc;strokeColor=#d6b656;fontSize=13;fontStyle=1;arcSize=8;verticalAlign=middle;align=center;" vertex="1" parent="1">
      <mxGeometry x="43" y="406" width="334" height="64" as="geometry" />
    </mxCell>
    <mxCell id="node5" value="关键改造3：单质粒整合策略（pAM92）及补充ADS恢复" style="rounded=1;whiteSpace=wrap;html=1;fillColor=#fff2cc;strokeColor=#d6b656;fontSize=13;fontStyle=1;arcSize=8;verticalAlign=middle;align=center;" vertex="1" parent="1">
      <mxGeometry x="40" y="528" width="340" height="64" as="geometry" />
    </mxCell>
    <mxCell id="node6" value="结果：MK额外表达产量×3倍，lacUV5+优化MevT×5倍，最终达到293 mg/L/OD600（7倍提升）" style="rounded=1;whiteSpace=wrap;html=1;fillColor=#f8cecc;strokeColor=#b85450;fontSize=13;fontStyle=1;arcSize=8;verticalAlign=middle;align=center;" vertex="1" parent="1">
      <mxGeometry x="40" y="650" width="340" height="64" as="geometry" />
    </mxCell>
    <mxCell id="node7" value="结论：模块化载体系统快速平衡限速酶表达，产量300 mg/L/OD600，策略可推广至其他途径" style="rounded=1;whiteSpace=wrap;html=1;fillColor=#f8cecc;strokeColor=#b85450;fontSize=13;fontStyle=1;arcSize=8;verticalAlign=middle;align=center;" vertex="1" parent="1">
      <mxGeometry x="40" y="772" width="340" height="64" as="geometry" />
    </mxCell>
    <mxCell id="edge1" style="edgeStyle=orthogonalEdgeStyle;rounded=1;orthogonalLoop=1;jettySize=auto;html=1;endArrow=block;endFill=1;strokeWidth=1.6;exitX=0.5;exitY=1;exitDx=0;exitDy=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;strokeColor=#6c8ebf;" edge="1" parent="1" source="node1" target="node2">
      <mxGeometry relative="1" as="geometry" />
    </mxCell>
    <mxCell id="edge2" style="edgeStyle=orthogonalEdgeStyle;rounded=1;orthogonalLoop=1;jettySize=auto;html=1;endArrow=block;endFill=1;strokeWidth=1.6;exitX=0.5;exitY=1;exitDx=0;exitDy=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;strokeColor=#82b366;" edge="1" parent="1" source="node2" target="node3">
      <mxGeometry relative="1" as="geometry" />
    </mxCell>
    <mxCell id="edge3" style="edgeStyle=orthogonalEdgeStyle;rounded=1;orthogonalLoop=1;jettySize=auto;html=1;endArrow=block;endFill=1;strokeWidth=1.6;exitX=0.5;exitY=1;exitDx=0;exitDy=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;strokeColor=#d6b656;" edge="1" parent="1" source="node3" target="node4">
      <mxGeometry relative="1" as="geometry" />
    </mxCell>
    <mxCell id="edge4" style="edgeStyle=orthogonalEdgeStyle;rounded=1;orthogonalLoop=1;jettySize=auto;html=1;endArrow=block;endFill=1;strokeWidth=1.6;exitX=0.5;exitY=1;exitDx=0;exitDy=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;strokeColor=#d6b656;" edge="1" parent="1" source="node4" target="node5">
      <mxGeometry relative="1" as="geometry" />
    </mxCell>
    <mxCell id="edge5" style="edgeStyle=orthogonalEdgeStyle;rounded=1;orthogonalLoop=1;jettySize=auto;html=1;endArrow=block;endFill=1;strokeWidth=1.6;exitX=0.5;exitY=1;exitDx=0;exitDy=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;strokeColor=#b85450;dashed=1;" edge="1" parent="1" source="node5" target="node6">
      <mxGeometry relative="1" as="geometry" />
    </mxCell>
    <mxCell id="edge6" style="edgeStyle=orthogonalEdgeStyle;rounded=1;orthogonalLoop=1;jettySize=auto;html=1;endArrow=block;endFill=1;strokeWidth=1.6;exitX=0.5;exitY=1;exitDx=0;exitDy=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;strokeColor=#b85450;dashed=1;" edge="1" parent="1" source="node6" target="node7">
      <mxGeometry relative="1" as="geometry" />
    </mxCell>
  </root>
</mxGraphModel></diagram></mxfile>