This intronless gene was thought to be a transcribed pseudogene of POU class 5 homeobox 1, however, it has been reported that this gene can encode a functional protein. The encoded protein is nearly the same length as and highly similar to the POU class 5 homeobox 1 transcription factor, has been shown to be a weak transcriptional activator and may play a role in carcinogenesis and eye development.,POU5F1B,OCT4-PG1,OCT4PG1,OTF3C,OTF3P1,POU5F1P1,POU5F1P4,POU5FLC20,POU5FLC8,Epigenetics & Nuclear Signaling,Transcription Factors,POU5F1B