SELECT T1.id ,  T1.name FROM enzyme AS T1 JOIN medicine_enzyme_interaction AS T2 ON T1.id  =  T2.enzyme_id WHERE T2.interaction_type  =  'activitor' GROUP BY T1.id ORDER BY count(*) DESC LIMIT 1
What is the id and name of the enzyme that can interact with the most medicines as an activator?
[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);