EEF1A2 and neoplasm: Additionally, Bld-1 peptide shows homology with SIRDARR motif in human sialic acid-binding immunoglobulin-like lectins 6 and 9 (Siglec 6 and 9), which interact with Neu5Acα2–6GalNAcα1(sialyl-Tn abbreviated as STn), a tumor-associated carbohydrate antigen that is overexpressed in various tumor cells24–26.