Purity ~90% (SDS-PAGE). GNAI2 is an alpha subunit of guanine nucleotide binding proteins (G proteins). The protein contains the guanine nucleotide binding site and is involved in the hormonal regulation of adenylate cyclase. Several transcript variants encoding different isoforms have been detected for this gene, but the full-length nature of only two are known so far. Source: Recombinant protein corresponding to aa1-355 of human GNAI2, fused to His-tag at N-terminal expressed in E. coli. Molecular Weight: ~42kD AA