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Moderate cytoplasmic and nuclear immunoreactivity was generally observed in malignant cells. Most testicular cancers as well as cases of malignant carcinoids, malignant melanomas, hepatocellular carcinomas, basal cell carcinomas, ovarian and endometrial cancers were strongly stained.
The protein encoded by this gene is the alpha-3 subunit of one of several alpha/beta-subunit heterodimeric transcription factors that regulate many adaptive responses to low oxygen tension (hypoxia). The alpha-3 subunit lacks the transactivation domain found in factors containing either the alpha-1 or alpha-2 subunits. It is thought that factors containing the alpha-3 subunit are negative regulators of hypoxia-inducible gene expression. Multiple alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Mar 2011]
GO:0000981 [RNA polymerase II transcription factor activity, sequence-specific DNA binding] GO:0045944 [positive regulation of transcription from RNA polymerase II promoter]
GO:0000981 [RNA polymerase II transcription factor activity, sequence-specific DNA binding] GO:0006355 [regulation of transcription, DNA-templated] GO:0045944 [positive regulation of transcription from RNA polymerase II promoter]
GO:0000981 [RNA polymerase II transcription factor activity, sequence-specific DNA binding] GO:0045944 [positive regulation of transcription from RNA polymerase II promoter]