凝胶电泳是实验室中用于测量和分类DNA链的一种方法。这是必需的，因为即使在大多数显微镜下观察，正常条件下的DNA仍然很小，无法操作。凝胶电泳实验室使用相对简单的程序，同样的基本技术也可以用于分离单个蛋白质。
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