Reconstitute at 0.5 mg/mL in sterile PBS. HHV-8 ORF74 is a gene encoded by Human Herpesvirus 8 (HHV-8), also known as Kaposi's Sarcoma-associated Herpesvirus (KSHV). ORF74 is notable for encoding a G protein-coupled receptor (GPCR) known as vGPCR or KSHV