3.4.23.40	analysis of solvent structure in crystals, comparison of aspartic proteases, zymogen form	
3.4.23.40	to 1.72 A resoultion. Structure includes two molecules, built up by two glycosylated peptide chains of 31 and 15 kDa. The glycosyl content is described by 19 sugar rings attached to residues Asn67 and Asn257 localized on the molecular surface away from the conserved active site. A hydrogen bond between Gln126 and Manbeta4 renders the monosaccharide oxygen O2 sterically inaccessible to accept a xylosyl residue, explaining a hitherto unknown type of plant glycan. The Arg-Gly-Asp sequence, involved in recognition of a putative cardosin A receptor, is found in a loop between two beta-strands on the molecular surface opposite the active site cleft