There are a number of ELISA Kits available for the measurement of GA repeat binding protein, beta 1, another term for the human protein, GA binding protein transcription factor subunit beta 1. Other synonyms may include: GA-binding protein subunit beta-1, GA binding protein transcription factor beta subunit 1 transcript variant gamma-2, GABP subunit beta-2, nuclear respiratory factor 2, transcription factor E4TF1-53, BABPB2, and E4TF1. It is encoded by the GABPB1 gene to yield a protein 395 amino acids in length and 42.5 kDa in size. However, there are up to 4 reported isoforms. Versions of GA repeat binding protein, beta 1 are present in other organisms, including: Mouse, Rat, Zebrafish, Frog, Chicken.