SELECT T1.interaction_type FROM medicine_enzyme_interaction AS T1 JOIN medicine AS T2 ON T1.medicine_id  =  T2.id JOIN enzyme AS T3 ON T1.enzyme_id  =  T3.id WHERE T3.name  =  'ALA synthase' AND T2.name  =  'Aripiprazole'
What is the type of interaction for the enzyme named 'ALA synthase' and the medicine named 'Aripiprazole'?
[Schema (values) (types)]: | medicine_enzyme_interaction |  medicine : id (text) , name (number) , trade_name (text) , fda_approved (text) | enzyme : id (text) , name (number) , location (text) , product (text) , chromosome (text) , omim (number) , porphyria (text) | medicine_enzyme_interaction : enzyme_id (text) , medicine_id (number) , interaction_type (text);