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Thymuses of CD73/PAP double knockouts show comparable morphology and cell distribution to wild type mice. (a) Hematoxylin and eosin stainings of wild type and CD73/PAP knockout thymuses. (b) Immunofluorescence stainings of wild type and CD73/PAP knockout thymuses using anti-CD4 (green) and anti-CD25 (red) antibodies.
