What is the id and name of the enzyme with most number of medicines that can interact as 'activator'?
create table medicine_enzyme_interaction (enzyme_id varchar, interaction_type varchar, PRIMARY KEY (enzyme_id)); create table enzyme (id varchar, name varchar, PRIMARY KEY (id))
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