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Triple IHC for P75NGFR (purple), BMI1 (brown) and ALDH1 (gray), in human testis. Microwave heating was used for denaturation of preceding reaction complex. Negative Control mouse IgG1 was used instead of: anti-P75NGFR (A), anti-BMI1 (B), and anti-ALDH1 (C) antibodies.
