System Suitability Study, were analyzed along with the TCGA Breast Cancer tumor samples. These 5 iTRAQ experiments include proteome and phosphoproteome interrogation of both the P5 (basal) and P6 (luminal) human-in-mouse xenograft breast carcinoma pooled samples. The CompRef experiments were intercalated between the TCGA Breast Cancer experiments to monitor the consistency of laboratory protocols and mass spectrometry instrument performance.]]>