CS chains of serglycin secreted by breast cancer cells did not contain detectable amounts of oversulfated disaccharides [disulfated (4,6) disaccharides] found in serglycin from hematopoietic cells, such as basophils, monocytes, macrophages, connective tissue, and mucosal mast cells [1], [33]. The gene discussed is SRGN; the disease is breast cancer.