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The majority of cancer cells derived from epithelial tissue express Lewis-Y (LeY) type difucosylated oligosaccharides on their plasma membrane. This results in the modification of cell surface receptors by the LeY antigen. We used the epidermal growth factor (EGF) receptor family members ErbB1 and ErbB2 as model systems to investigate whether the sugar moiety can be exploited to block signaling by growth factor receptors in human tumor cells (i.e., SKBR-3 and A431, derived from a breast cancerdoi:10.1158/0008-5472.can-03-2435 pmid:14871842 fatcat:z36afzjkknfgtip6pgtwdygmke