Size exclusion chromatography of glycosaminoglycan chains obtained after β-elimination of proteoglycans from the supernatant (A) and cell extract (B) of the murine erythroid progenitor cell line ELM-D. Proteoglycans from the supernatant (A) and cell extract (B) of ELM-D cells were treated first either by heparinase/heparitinase or chondroitinase AC/ABC and thereafter submitted to β-elimination. Size-exclusion chromatography was performed on a TSK 4000 column. Elution profiles were monitored by liquid scintillation counting.