Ampholytes are electrophoresed through the gel prior to sample addition. 在加入样品前，两性电解质先通过凝胶电泳。
The phosphorylated proteins were successfully extracted from human kidney tissues and were separated by two-dimensional gel electrophoresis. 成功提取了人肾组织磷酸化蛋白，并得到了磷酸化蛋白的双向凝胶电泳图谱。
