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Figure 1 Hyaluronidase SD and chondroitinase ABC (HABC) and chondroitinase ACII (AC2) digests of leaflet and chordae, with the first lane showing monosaccharide/disaccharide standard (STD) bands. The 4S- and 6S-galNAc (N-acetylgalactosamine-4- and 6-sulfate) are the non-reducing terminal ends of the GAG chains. {Delta}Di0S = unsulfated chondroitin; {Delta}Di2S = chondroitin/dermatan 2-sulfate; {Delta}Di4S = chondroitin/dermatan-4-sulfate; {Delta}Di6S = chondroitin/dermatan-6-sulfate; {Delta}Di4,6S = chondroitin/dermatan-4,6-sulfate; {Delta}DiHA = hyaluronan.