Furthermore, expression of genes involved in glycosylation of mucins and sialic acid metabolisms, namely sialyltransferase ST8SIA4, ST6GALNAC2, mannosidase MAN1A1, and acetylglucosaminyltransferase B3GNT8, was also validated as unique to CF (Figure 6). The gene discussed is MAN1A1; the disease is cystic fibrosis.