Phenylalanyl-tRNA synthetase 2 mitochondrial(FARS2) is a member of the class II aminoacyl- tRNA synthetase family. FARS2 is a mitochondrial matrix protein. FARS2 when acting as a monomer, catalyzes the ATP-dependent conversion of L-phenylalanine and tRNA(Phe) to L-phenlalanyltRNA(Phe), an event which is vital for proper translation and protein expression.