Listed are ELISA Kits for the detection of trans-acting transcription factor 1, an alias name of Sp1 transcription factor. The human protein, encoded by the gene SP1, is 785 amino acid residues long and has a mass of 80,693 daltons. However, there are up to 3 reported isoforms. It is a member of the Sp1 C2H2-type zinc-finger protein family. This protein is reported to have a cytoplasmic and nuclear cellular localization, and is glycosylated. This target may also be known as: transcription factor Sp1, and specificity protein 1.