GPRC6A and pancreatic insulinoma: INS-1 832/3 cells, a sub-clone of the INS-1 rat insulinoma cell line previously shown to express GPRC6A and to respond to OCN (Ferron et al., 2010a; Pi et al., 2016), were treated with vehicle or low doses of non-glycosylated and glycosylated ucOCN for 8 hr.