D-glyceraldehyde 3-phosphate + D-sedoheptulose 7-phosphate --> β-D-fructose 6-phosphate + D-erythrose 4-phosphate (according to UniProt)

Sedoheptulose 7-phosphate + D-glyceraldehyde 3-phosphate = D-erythrose 4-phosphate + D-fructose 6-phosphate (according to Swiss-Prot)