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The dysregulation of the cancer cell secretome is known to play key roles in tumor transformation and progression.The majority of proteins in the secretome are secretory proteins and membrane-released proteins that are glycosylated1.Until recently,few studies have explored protein N-glycosylation changes in the secretome.Here,the N-glycoproteins in the secretome of two human hepatocellular carcinoma (HCC) cell lines with low (MHCC97L) or high (HCCLM3) metastatic potential were investigated.