欧美国产日韩在线免费观看-欧美日韩成人激情一区二区-欧美久久综合一区二区-亚洲av寂寞少妇久久

SRY （sex determining region Y）-box 2, also known as SOX2, is a transcription factor that is essential for maintaining self-renewal, or pluripotency, of undifferentiated embryonic stem cells. Sox2 has a critical role in maintenance of embryonic and neural stem cells. Sox2 is a member of the Sox family of transcription factors, which have been shown to play key roles in many stages of mammalian development. This protein family shares highly conserved DNA binding domains known as HMG （High-mobility group） box domains containing approximately 80 amino acids.