SEARCH Articles Figures Tables Cysteine protease proproteins FL3-27 gene proprotein PRL1 PRL2 proproteins Potato multicystatin PMC proprotein Proprotein convertase Proprotein convertase subtilisin-like kexin-type Proprotein convertase subtilisin/kexin type Proprotein convertases Proprotein processing Proprotein processing protease Proprotein processing serine proteases Proproteins Proproteins Proteins proprotein Serine proteases in proprotein processing Sorghum CPI proprotein