Ready-to-use ELISA kits are available for the detection of xzfy-1, an alias of the protein, YY1 transcription factor. The official gene symbol is YY1. The protein, with a mass of 44.7 kDa and length of 414 residues, is reported to be nuclear. It is a member of the YY transcription factor family and may be known by other names, including: GADEVS, DELTA, Yin and Yang 1 protein, YY-1, INO80 complex subunit S, and transcriptional repressor protein YY1, and NF-E1.