https://api.elsevier.com/content/article/pii/S0141813020346444doi:10.1016/j.ijbiomac.2020.10.0221-s2.0-S014181302034644410.1016/j.ijbiomac.2020.10.022S0141-8130(20)34644-4Papain-like cysteine proteinase zone (PCP-zone) and PCP structural catalytic core (PCP-SCC) of enzymes with cysteine proteinase fold International Journal of Biological MacromoleculesJournal014181302020-12-1515 December 20200falsefalse