This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is alpha-D-galactosyl-(1→3)-myo-inositol:raffinose galactosyltransferase. Other names in common use include galactinol-raffinose galactosyltransferase, and stachyose synthetase.
Lehle L, Tanner W (1973). "The function of myo-inositol in the biosynthesis of raffinose Purification and characterization of galactinol:sucrose 6-galactosyltransferase from Vicia faba seeds". Eur. J. Biochem. 38 (1): 103–10. PMID4774118. doi:10.1111/j.1432-1033.1973.tb03039.x.
Preiss, J. (Ed.), The Biochemistry of Plants, vol. 3, Academic Press, New York, 1980, p. 221-270.