These GRB1 ELISA kits are immunodetection tools for measuring the levels of GRB1 in biological samples. GRB1 is an alias of the human PIK3R1 gene, which encodes the protein, phosphoinositide-3-kinase regulatory subunit 1. Notably, GRB1 is known to play a role in B cell differentiation and insulin signaling pathways, among other functions. The PIK3R1 protein is 724 amino acid residues in length and 83.6 kilodaltons in mass. However, as many as 5 protein isoforms have been identified. This protein is known to be ubiquitinated and phosphorylated. Other names for this target antigen include AGM7 and IMD36. Click on the following ELISA kits for more detailed information, including target reactivity and assay sensitivity.