So the ribosomes found on the rough Er basically synthesize these hydrolytic enzymes. And once synthesized, they are basically modified in some way by adding the endgycoacetic linkages. And then those hydrolytic enzymes are transferred into this membraneous sac known as the Golgi apparatus. And as they move within the Golgaparatus, a special enzyme known as phosphotransphrase basically adds up a sporal group onto the mano sugar found on the hydrolytic enzyme and that produces the manos six phosphate. Now, the special thing about this modified sugar molecule found on the hydrolytic enzymes is that it is the marker. It basically dictates exactly where the hydrolytic enzyme will actually end up.