This predicate describing actors in events relates an instance of molecule to an event in which it adapts one chemical object to another in order to facilitate the formation of a chemical bond between the two ChemicalObjects. Adapting involves recognizing a chemical object as an appropriate chemical reactant for a chemical reaction involving another chemical object. For example, in translation event, transfer RNA molecule molecules play the role of adaptor molecules by recognizing AminoAcids needed by messenger RNA molecule to build a protein.