ST6GAL1 (ST6 Beta-Galactoside Alpha-2,6-Sialyltransferase 1): ST6GAL1 is a gene that encodes an enzyme involved in the addition of sialic acid to glycoproteins. This function is important for cellular recognition and signalling processes. Alterations in ST6GAL1 activity have been linked to diseases such as cancer and autoimmune disorders.