A peroxidase gene derived from Arthromyces of the following nucleotide sequence: z-CA GGGTCCTGGAGGAGGAGGCGGGTCAGTCACTTGCCCGGGTGGACAGTCCACTTCGAACAG CCAGTGCTGCGTCTGGTTCGACGTTCTAGACGATCTTCAGACCAACTTCTACCAAGGGTC CAAGTGTGAGAGCCCTGTTCGCAAGATTCTTGAATTGTTTTCCATGACCGCGATCGGATT TTCGCCGGCGTTGACTGCTGCTGGTCAATTCGGTGGTGGAGGAGCTGATGGCTCCATCAT TGCGCATTCGAACATCGAATTGGCCTTCCCGGCTAATGGCGGCCTCACCGACACCATCGA AGCCCTCCGCGCGGTCGGTATCAACCACGGCGTCTCTTTCGGCGATCTCATCCAATTCGC CACTGCCGTCGGCATGTCCAACTGCCCTGGCTCTCCTCGACTTGAGTTCTTGACGGGAAG AAGCAACAGTTCCCAGCCCTCCCCTCCTTCGCTGATCCCGGGTCCTGGAAACACTGTCAC TGCTATCTTGGATCGTATGGGCGATGCAGGCTTCAGCCCTGTGAAGTCGTTGACTTGCT TGCTGCGCATAGTTTGGCTTCTCAGGAAGGTTTGAACTCGGCTATTTTCAGGTCGCCTTT GGACTCGACCCCTCAAGTTTTCGATACCCAGTTCATATCGAGACCTTGCTCTCAAGGGAAC CACTCAGCCCGGACCCTCTCTCGGCTTTGCAGAGGAGCTCCCCCTTCCCTGGTGAATT CCGCATGAGGTCCGACGCTCTCTTGGCTCGCGACTCCCGAACCGCCTGCCGATGGCAATC CATGACCAGCAGCAATGAAGTTATGGGCCAGCGATACCGCGCCGCCATGGCCAAGATGTC TGTTCTCGGCTTCGAGGAACGCCCCACCGATTGCTGACGTTATTCCTTCTGCTCCTGT GTCCAACAACGCTGCTCCTGTTATCCCTGGTGGCCTTACTGTCGATGATATTGAGGTTTC GTGCCCGAGCGAGCCTTTCCCTGAAATTGCTACCGCCTCAGGCCCTCTCCCCTCCCTCGC TCCTGCTCCT wherein Z represents either nothing or a nucleotide sequence encoding a substantially identical biological activity thereof, ATGAAGCTCTGGCTTTTCTCCACCTTCGCTGCTGTCATCATCGGTGCTCTCGCTCTCCCC and a process for producing a peroxidase by said gene were provided.