Sean Penn is a film actor.
Thioesterases are enzymes which belong to the esterase family .. esterase. esterase. Esterases , in turn , are one type of the several hydrolases known .. hydrolases. hydrolases. Thioesterases exhibit Esterase activity -LRB- splitting of an ester into acid and alcohol , in the presence of water -RRB- specifically at a thiol group .. thiol. thiol. Thioesterases or thiolester hydrolases are identified as members of E.C. 3.1.2 .. hydrolases. hydrolases