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Thyroid cancers showed moderate to strong cytoplasmic positivity in a fraction of tumor cells. A few breast, ovarian and renal cancers were moderately stained. Several squamous cell carcinomas of cervix and skin along with few urothelial cancers showed weak to moderate cytoplasmic and/or nuclear staining. Remaining cancer tissues were negative.
The protein encoded by this gene shares a critical BH3 domain with other death-promoting proteins, such as BID, BAK, BAD and BAX, that is required for its pro-apoptotic activity, and for interaction with anti-apoptotic members of the BCL2 family, and viral survival-promoting proteins. Since the activity of this protein is suppressed in the presence of survival-promoting proteins, it is suggested as a likely target for anti-apoptotic proteins. [provided by RefSeq, Sep 2011]