Since NEO-201 binds to tumor-associated variants of CEACAM5 and CEACAM6 and CEACAM proteins are highly glycosylated proteins involved in cell migration, metastasis and drug resistance [7], in this study, we evaluated if NEO-201 can recognize specific glycan patterns attached on the protein structure of CEACAM5 and CEACAM6 during post-translational modifications made by mammalian cells. Here, CEACAM5 is linked to neoplasm.