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Application of MALDI-IHC to two FFPE breast cancer tissue samples to determine the HER2 status of the patients. Patient 1 (left) shows a low abundance of the HER2 mass reporter, while patient 2 (right) shows a high abundance of the HER2 mass reporter and therefore showed to be HER2+. The HER2 status (negative for patient 1, positive for patient 2) found with MALDI-IHC is consistent with the breast cancer pathology annotations provided with the samples.
