3.4.22.B14 C16.001, first papain-like cysteine proteinase, mouse hepatitis virus papain-like proteinase 1, PL1, PL1-PRO, PL1pro, PLP-1, PLP1, PLP1 proteinase, PLpro, replicase polyprotein 1a - -, 668774, 670071, 670849, 681672, 709449, 709746, 709752, 752911, 754125, 755428