RGS12_us1 is a region of Regulator of G-protein signalling 12 proteins that is natively unstructured and lies N-terminal to other such regions in UniProt:E1BPP4. It is very glycine-rich, and the function is not known.

1: A P-loop mutation in Galpha subunits prevents transition to the active state: implications for G-protein signaling in fungal pathogenesis. Bosch DE, Willard FS, Ramanujam R, Kimple AJ, Willard MD, Naqvi NI, Siderovski DP; PLoS Pathog. 2012;8:e1002553 PMID:22383884