D-tagatofuranose 1,6-bisphosphate = D-glyceraldehyde 3-phosphate + dihydroxyacetone phosphate Carbohydrate metabolism; D-tagatose 6-phosphate degradation; D-glyceraldehyde 3-phosphate and glycerone phosphate from D-tagatose 6-phosphate: step 2/2. By lactose. The operon consists of lacABCDFEGX. This gene was sequenced from pMG820, a laboratory-derived deletion of the naturally occurring plasmid pLP712. Belongs to the aldolase LacD family.