Western印迹是临床医生可能会使用或要求的一种诊断技术。Western印迹通过分离样品（通常是血液样品）中的所有不同蛋白质来发挥作用。一旦分离了这些蛋白质，就可以使用称为抗体的物质来检测特定的蛋白质。这些特定蛋白质的存在与否，或检测到的蛋白质的水平，将导致诊断。如果使用诊断性蛋白质印迹，则临床医生应要求测试，并使用可靠的实验室进行分析。

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