Protease that cleaves specifically after arginine or lysine residues. Optimum pH is 7.5. Has activity up to pH 9.5. Optimum temperature is 25 degrees Celsius. Expressed during all parasite blood stages (at protein level). Belongs to the peptidase C14B family. In contrast to other metacaspases of the peptidase C14B family, the catalytic histidine and cysteine residues do not appear to be conserved. Contains a serine residue at the position of the canonical catalytic cysteine which may constitute the active site.