Patent ID: 8431378

Claim:
An isolated DNA (A) having the base sequence of SEQ ID NO: 2 in the sequence list; or (B) being hybridizable with DNA complementary with the base sequence of SEQ ID NO: 2 in the sequence list under stringent conditions, and having an amino group transfer activity, which produces acetophenone and 1-benzyl-3-aminopyrrolidine from 1-benzyl-3-pyrrolidinone and optically active (S)-α-phenethylamine, wherein said DNA encodes an aminotransferase enzyme, and wherein the stringent conditions are conditions in which hybridization is carried out at 65° C. in the presence of NaCl of 0.7 M to 1.0 M with a filter on which a polynucleotide derived from a colony or plaque is immobilized, and then the filter is washed at 65° C. with a 2×SSC solution.