ERBB2 and breast adenocarcinoma: Total bound immunoglobulin in the form of gemcitabine-(C4-amide)-[anti-HER2/neu] or gemcitabine-(C4-amide)-[anti-EGFR] on the external surface membrane of adherent mammary adenocarcinoma (SKBr-3) populations was measured by cell-ELISA (Figure 3).