Patent ID: 7695931

Claim:
An isolated peptide selected from the following (a), (b), or (c): (a) a peptide consisting of the amino acid sequence as shown in SEQ ID NO: 4; (b) a peptide which is isolated from a naturally occurring bacterium and which consists of an amino acid sequence having a 90% or more identity with the amino acid sequence as shown in SEQ ID NO: 4 and has β-ionone ring-2-hydroxylase activity; or (c) a peptide which is encoded by a DNA consisting of the nucleotide sequence as shown in SEQ ID NO: 3 or a DNA that hybridizes to the full complement of SEQ ID NO:3 under stringent conditions of about 0.2X SSC, 0.1% SDS, 65° C. and has β-ionone ring-2-hydroxylase activity.