Amino-acid racemase able to utilize a broad range of substrates (PubMed:25963389). Can use Met, Leu, Phe, Ala, Ser, Ile, Val, Trp, Tyr and Thr (PubMed:25963389, PubMed:28343923). Is mostly active with Phe, Leu, Met and Tyr, followed by Ile, Thr and Trp. Has weaker activity with Val, Ser and Ala (PubMed:28343923). Shows no activity toward Pro, Asp, Glu, Arg, His, Gln and Asn (PubMed:25963389, PubMed:28343923). an L-alpha-amino acid = a D-alpha-amino acid L-phenylalanine = D-phenylalanine L-leucine = D-leucine L-methionine = D-methionine L-tyrosine = D-tyrosine L-isoleucine = D-allo-isoleucine L-threonine = D-threonine L-tryptophan = D-tryptophan Inhibited by hydroxylamine. Optimum pH is 6.5-7.5. Shows extremely high thermostability. Retains full activity after incubation at 80 degrees Celsius for at least 2 hours. Homodimer. Belongs to the class-III pyridoxal-phosphate-dependent aminotransferase family.