Cysteine protease. Active from pH 3.0 to 10.5. Active up to 62 degrees Celsius. Laticifer. Not glycosylated. Stable in 8 M urea and 2.5 M GuHCl at neutral pH, in 40% acetonitrile, 70% ethanol and 50% methanol. Unstable in SDS. Belongs to the peptidase C1 family.