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Bone marrow findings and ADA2 enzyme activity. A, Left: Bone marrow aspirate. Right: Bone marrow core biopsy B, Immunohistochemistry: Myeloperoxidase (MPO); Erythroid (CD71); B cells (CD20), T cells (CD3); C, ADA2 plasma enzyme activity levels from the patient, pre and post transplant, her 1st degree carrier relatives, and 10 healthy, non-related controls.
