CCL16 and cancer: Therefore, we cannot exclude that Galβ1-3GlcNAcβ1-6GalNAcα or its elongated form X-Galβ1-3GlcNAcβ1-6GalNAcα (X is Neu5Ac or an oligosaccharide) is the actual target for cancer-associated anti-LeC antibodies or a key constituent of a more sophisticated antigen (see below).