3roj is a 4 chain structure with sequence from Synechocystis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
[FBSB_SYNY3] Catalyzes the hydrolysis of fructose 1,6-bisphosphate (Fru 1,6-P2) and sedoheptulose 1,7-bisphosphate (Sed 1,7-P2) to fructose 6-phosphate and sedoheptulose 7-phosphate, respectively (By similarity).