-- Database schema
| medicine : id [ INT ] primary_key , name [ TEXT ] , Trade_Name [ TEXT ] , FDA_approved [ TEXT ] | enzyme : id [ INT ] primary_key , name [ TEXT ] , Location [ TEXT ] , Product [ TEXT ] , Chromosome [ TEXT ] , OMIM [ INT ] , Porphyria [ TEXT ] | medicine_enzyme_interaction : enzyme_id [ INT ] primary_key medicine_enzyme_interaction.enzyme_id = enzyme.id , medicine_id [ INT ] medicine_enzyme_interaction.medicine_id = medicine.id , interaction_type [ TEXT ] |
-- -- What is the id and name of the enzyme with most number of medicines that can interact as 'activator'?

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;