Protease that may act during cell growth and/or development. Specificity similar to, but narrower than, that of pepsin A. Does not cleave the 4-Gln-|-His-5 bond in B chain of insulin. Monomer. Expressed in both vegetative and differentiating cells, with a higher level in vegetative cells. N-glycosylated on 2 out of the 3 potential sites. Glycans contain sulfated Mannose. Belongs to the peptidase A1 family.