Broad-specificity glycosaminoglycan lyase, which acts in an exolytic fashion, and preferentially degrades the tetra- and hexasaccharide derivatives of chondroitin sulfate and dermatan sulfate produced by the chondroitin sulfate ABC endolyase, to yield the respective disaccharides. To a lesser extent, is also able to split off disaccharide residues directly from polymeric chondroitin 4- and 6-sulfate, dermatan sulfate, chondroitin, and hyaluronan. Is not active against keratan sulfate, heparan sulfate, and heparin. Exolytic removal of Delta(4)-unsaturated disaccharide residues from the non-reducing ends of both polymeric chondroitin/dermatan sulfates and their oligosaccharide fragments. Inhibited by Zn(2+), whereas Ni(2+), Fe(2+), and Cu(2+) have little or no effect on activity. Optimum pH is 8. Optimum temperature is 40 degrees Celsius (PubMed:9083041). Optimum temperature is 37 degrees Celsius (PubMed:18849565). Belongs to the polysaccharide lyase 8 family.