PSMB8 and plasma cell myeloma: In patient-derived myeloma cell lines that were engineered to constitutively express mutant forms of either KRAS, NRAS or BRAF, the expression of each of these oncogenes increased the transcription of proteasome 20S subunit beta 8, 9 and 10 (PSMB8, PSMB9 and PSMB10) (Shirazi et al., 2020).