The number of identified proteins in four separate experiments with and without iTRAQ labeling.

Each experiment was performed four times, and the number of identified proteins is an average from all experiments. The notes ≥3, 2, and 1 indicate the number of unique peptides per protein.每项实验均重复开展四次，所统计的鉴定到的蛋白质（identified proteins）数量为全部实验结果的平均值。注释中≥3、2及1分别代表单个蛋白质所对应的唯一肽段（unique peptides）数目。