The G13 subunit is an alpha unit of heterotrimeric G proteins that regulates cell processes through the use of guanine nucleotide exchange factors. G13 regulates actin cytoskeletal remodeling in cells and is essential for receptor tyrosine kinase-induced migration of fibroblast and endothelial cells.
Source: [Wikipedia](https://en.wikipedia.org/wiki/G12/G13_alpha_subunits)
Proteins on this pathway have targeted assays available via the [CPTAC Assay Portal](https://assays.cancer.gov/available_assays?wp_id=WP524)