ID 2.4.1.67 DE galactinol--raffinose galactosyltransferase. AN galactinol-raffinose galactosyltransferase. AN stachyose synthetase. CA alpha-D-galactosyl-(1->3)-1D-myo-inositol + raffinose = myo-inositol + CA stachyose. CC -!- This enzyme also catalyzes galactosyl transfer from stachyose to CC raffinose (shown by labeling). CC -!- For synthesis of the substrate, see EC 2.4.1.123. CC -!- See also EC 2.4.1.82. DR Q93XK2, STSYN_PEA ; //