EP1282688-A  See references of WO 0190312A1WO200190312-A  DATABASE [Online] 29 November 1994 (1994-11-29) TESKE ET AL: "Evolutionary relationships among ammonia- and nitrite-oxidizing bacteria" retrieved from EBI, accession no. EMBL:NB16SR1 Database accession no. L35505 XP002178145;  DATABASE [Online] PURKHOLD ET AL: "Comparative 16S rRNA and amoA sequence analysis: Implications for molecular diversity surveys" retrieved from EBI, accession no. EMBL:AF272420 Database accession no. AF272420 XP002178147;  DATABASE [Online] VAN DER MEER ET AL: "Characterization of the bacterial composition of a nitrogen-removing biofilm from a trickling filter at Kollikon, Switzerland" retrieved from EBI, accession no. EMBL:NSA224941 Database accession no. AJ224941 XP002178146;  HEAD ET AL: "The phylogeny of autotrophic ammonia-oxidizing bacteria as determined by analysis of 16S ribosomal RNA gene sequences" JOURNAL OF GENERAL MICROBIOLOGY, vol. 139, 1993, pages 1147-1153, XP001028243;  SUWA ET AL: "Phylogenetic relationships of activated sludge isolates of ammonia oxidizers with different sensitivities to ammonium sulfate" J. GEN. APPL. MICROBIOL., vol. 43, 1997, pages 373-379, XP001028235 -& DATABASE [Online] 5 May 1998 (1998-05-05) SUWA: "Nitrosomonas sp. JL21 gene for 16S rRNA, partial sequence" retrieved from EBI, accession no. EMBL:AB000700 Database accession no. AB000700 XP002178162WO200190312-A1  DATABASE [Online] 29 November 1994 (1994-11-29) TESKE ET AL: &quot;Evolutionary relationships among ammonia- and nitrite-oxidizing bacteria&quot; retrieved from EBI, accession no. EMBL:NB16SR1 Database accession no. L35505 XP002178145;  DATABASE [Online] VAN DER MEER ET AL: &quot;Characterization of the bacterial composition of a nitrogen-removing biofilm from a trickling filter at Kollikon, Switzerland&quot; retrieved from EBI, accession no. EMBL:NSA224941 Database accession no. AJ224941 XP002178146;  DATABASE [Online] PURKHOLD ET AL: &quot;Comparative 16S rRNA and amoA sequence analysis: Implications for molecular diversity surveys&quot; retrieved from EBI, accession no. EMBL:AF272420 Database accession no. AF272420 XP002178147;  HEAD ET AL: &quot;The phylogeny of autotrophic ammonia-oxidizing bacteria as determined by analysis of 16S ribosomal RNA gene sequences&quot; JOURNAL OF GENERAL MICROBIOLOGY, vol. 139, 1993, pages 1147-1153, XP001028243;  SUWA ET AL: &quot;Phylogenetic relationships of activated sludge isolates of ammonia oxidizers with different sensitivities to ammonium sulfate&quot; J. GEN. APPL. MICROBIOL., vol. 43, 1997, pages 373-379, XP001028235 -&amp; DATABASE [Online] 5 May 1998 (1998-05-05) SUWA: &quot;Nitrosomonas sp. JL21 gene for 16S rRNA, partial sequence&quot; retrieved from EBI, accession no. EMBL:AB000700 Database accession no. AB000700 XP002178162EP1502948-A1  DATABASE EMBL 29 November 1994 (1994-11-29), TESKE ET AL: "Nitrosospira briensis (strain C-128) 16S ribosomal RNA (16S rRNA) gene" XP002309486 retrieved from EBI accession no. EMBL:NM16SR Database accession no. L35505;  DATABASE EMBL 29 November 1994 (1994-11-29), TESKE ET AL: &quot;Nitrosospira briensis (strain C-128) 16S ribosomal RNA (16S rRNA) gene&quot; XP002309486 retrieved from EBI accession no. EMBL:NM16SR Database accession no. L35505;  DATABASE EMBL 5 September 1994 (1994-09-05), TESKE ET AL: "Nitrosolobus multiformis (ATCC 25196) 16S ribosomal RNA (16S rRNA) gene" XP002309485 retrieved from EBI accession no. EMBL:NM16SR Database accession no. L35509;  DATABASE EMBL 5 September 1994 (1994-09-05), TESKE ET AL: &quot;Nitrosolobus multiformis (ATCC 25196) 16S ribosomal RNA (16S rRNA) gene&quot; XP002309485 retrieved from EBI accession no. EMBL:NM16SR Database accession no. L35509;  HOVANEC ET AL: &quot;Comparative analysis of nitrifying bacteria associated with freshwater and marine aquaria&quot; APPLIED AND ENVIRONMENTAL MICROBIOLOGY, vol. 62, 1996, pages 2888-2896, XP002267477;  HOVANEC ET AL: "Comparative analysis of nitrifying bacteria associated with freshwater and marine aquaria" APPLIED AND ENVIRONMENTAL MICROBIOLOGY, vol. 62, 1996, pages 2888-2896, XP002267477EP1282688-B1  DATABASE AeOnlineUe 29 November 1994 (1994-11-29) TESKE ET AL: "Evolutionary relationships among ammonia- and nitrite-oxidizing bacteria" retrieved from EBI, accession no. EMBL:NB16SR1 Database accession no. L35505 XP002178145;  DATABASE AeOnlineUe PURKHOLD ET AL: "Comparative 16S rRNA and amoA sequence analysis: Implications for molecular diversity surveys" retrieved from EBI, accession no. EMBL:AF272420 Database accession no. AF272420 XP002178147;  DATABASE AeOnlineUe VAN DER MEER ET AL: "Characterization of the bacterial composition of a nitrogen-removing biofilm from a trickling filter at Kollikon, Switzerland" retrieved from EBI, accession no. EMBL:NSA224941 Database accession no. AJ224941 XP002178146;  HEAD ET AL: "The phylogeny of autotrophic ammonia-oxidizing bacteria as determined by analysis of 16S ribosomal RNA gene sequences" JOURNAL OF GENERAL MICROBIOLOGY, vol. 139, 1993, pages 1147-1153, XP001028243;  SUWA ET AL: "Phylogenetic relationships of activated sludge isolates of ammonia oxidizers with different sensitivities to ammonium sulfate" J. GEN. APPL. MICROBIOL., vol. 43, 1997, pages 373-379, XP001028235 -& DATABASE AeOnlineUe 5 May 1998 (1998-05-05) SUWA: "Nitrosomonas sp. JL21 gene for 16S rRNA, partial sequence" retrieved from EBI, accession no. EMBL:AB000700 Database accession no. AB000700 XP002178162EP1502948-B1  DATABASE EMBL 29 November 1994 (1994-11-29), TESKE ET AL: &quot;Nitrosospira briensis (strain C-128) 16S ribosomal RNA (16S rRNA) gene&quot; XP002309486 retrieved from EBI accession no. EMBL:NM16SR Database accession no. L35505;  DATABASE EMBL 5 September 1994 (1994-09-05), TESKE ET AL: &quot;Nitrosolobus multiformis (ATCC 25196) 16S ribosomal RNA (16S rRNA) gene&quot; XP002309485 retrieved from EBI accession no. EMBL:NM16SR Database accession no. L35509;  HOVANEC ET AL: &quot;Comparative analysis of nitrifying bacteria associated with freshwater and marine aquaria&quot; APPLIED AND ENVIRONMENTAL MICROBIOLOGY, vol. 62, 1996, pages 2888-2896, XP002267477