Anti-OCT4 antibodies detect the protein encoded by the human gene, POU5F1, also known as POU class 5 homeobox 1. The full-length protein is 38,571 daltons in mass with 2 identified isoforms and is a member of the POU transcription factor family, Class-5 subfamily. The OCT4 antigen is a documented pluripotent stem cell marker
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