EXT2（exostosin glycosyltransferase 2），癌症关联基因，基因ID：2132，该基因编码参与硫酸乙酰肝素生物合成链延伸步骤的两种糖基转移酶之一。该基因突变导致多发性外生瘤的II型。另外，编码不同亚型的剪接转录变体已经被注意到。[由RefSeq提供，2008年7月]This gene encodes one of two glycosyltransferases involved in the chain elongation step of heparan sulfate biosynthesis. Mutations in this gene cause the type II form of multiple exostoses. Alternatively spliced transcript variants encoding different isoforms have been noted for this gene. [provided by RefSeq， Jul 2008]。