Binds 1 Mn(2+) ion per subunit. Expressed in both healthy and inflamed gingival tissue samples at similar levels, with higher expression in the gingival connective tissue compared to gingival epithelium. Strongest expression in testis, followed by leukocytes. The stop codon in position 277 is polymorphic and is replaced, though at very low frequency, by a Lys codon allowing the translation of a longer protein. It is not clear if the common, shorter variant shown here is functional or not. Belongs to the glycosyltransferase 6 family. Could be the product of a pseudogene.