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Double label immunohistochemistry of tumour nuclei with antibodies to T antigen, p53, and pRb. (A) In case 1, nuclei with immunopositivity for T antigen (brown with DAB as chromagen) are also immunopositive for p53 (Vector red chromagen). (B) T antigen positive nuclei of case 1 (DAB chromagen) are also positive for pRb (Vector red chromagen). All original magnifications, ×100.
