Fish Cytochrome P450s are undergoing a revision to their nomenclature.  Initially 
there appeared to be just one fish 1A gene per species, but that is not true as shown 
by Amy Berndtson in trout.  Until an adequate nomenclature can be devised, these fish 
sequences are listed as CYP1A, without a number following the subfamily.  This does 
not affect the mammalian gene designations, though it may affect the chicken 
sequences.

CYP1A1      Oncorhynchus mykiss (trout)
            GenEMBL S69278 (5023bp)
            Berndtson,A.K. and Chen,T.T.
            Two unique CYP1 genes are expressed in response to 
            3-methylcholanthrene treatment in rainbow trout.
            Arch. Biochem. Biophys. 310, 187-195 (1994)
            Note: published as CYP1A2, but it is more similar to Heilmann's sequence
            than Berndtson's 1A1 (97.9% identical).

CYP1A1      Oncorhynchus mykiss (trout)
            GenEMBL U62797(1697bp)
            Bailey,G., You,L. and Harttig,U.
            Cloning, sequencing and functional expression of two trout CYP1A
            cDNAs in yeast
            unpublished (1997)
            incorrectly called 1A2

CYP1A3      Oncorhynchus mykiss (trout)
            GenEMBL S69277 (5524bp)
            Berndtson,A.K. and Chen,T.T.
            Two unique CYP1 genes are expressed in response to 
            3-methylcholanthrene treatment in rainbow trout.
            Arch. Biochem. Biophys. 310, 187-195 (1994)
            Note: published as CYP1A1.  This sequence is 96.7% identical to
            Heilmann's 1A1 sequence.

CYP1A3      Oncorhynchus mykiss (trout)
            GenEMBL U62796(2401bp)
            Bailey,G., You,L. and Harttig,U.
            Cloning, sequencing and functional expression of two trout CYP1A
            cDNAs in yeast
            unpublished (1997)
            incorrectly called 1A1

CYP1A1/CYP1A3 chimera      Oncorhynchus mykiss (trout)
            PIR A28789 (522 amino acids)
            Heilmann, L.J., Sheen, Y.Y., Bigelow, S.W. and Nebert, D.W.
            Trout P450IA1: cDNA and deduced protein sequence, expression
            in liver, and evolutionary significance.
            DNA 7, 379-387 (1988)
            Published as CYP1A1
            note:  subsequent analysis has shown that the 5' end of this sequence
            comes from the 1A3 gene and the switch over occurs between base 271 
            and base 435 with base 1 as the A of the ATG start codon.

CYP1A       Pleuronectes platessa (plaice, a fish)
            GenEMBL X73631 (2411bp) PIR S34184 (521 amino acids)
            Leaver,M.J., Pirrit,L. and George,S.G.
            Cytochrome P450 1A1 cDNA from plaice (Pleuronectes platessa) 
            Mol. Marine Biol. Biotechnol. 2, 338-345 (1993)

CYP1A       Opsanus tau ( oyster toadfish)
            GenEMBL U14161 (2352bp)
            Morrison, H.G., Oleksiak, M.F., Cornell, N.W., Sogin,M.L. and 
            Stegeman, J.J.
            Identification of Cytochrome P450 1A genes from two teleost fish, toadfish
            (Opsanus tau) and scup (Stenotomus chrysops), and pyhlogenetic analysis 
            of CYP1A genes.
            Biochem. J. 308, 97-104 (1995)

CYP1A       Stenotomus chrysops (scup, a fish)
            GenEMBL U14162 (1566bp)
            Morrison, H.G., Oleksiak, M.F., Cornell, N.W., Sogin,M.L. and 
            Stegeman, J.J.
            Identification of Cytochrome P450 1A genes from two teleost fish, toadfish
            (Opsanus tau) and scup (Stenotomus chrysops), and pyhlogenetic analysis 
            of CYP1A genes.
            Biochem. J. 308, 97-104 (1995)

CYP1A       Chaetodon capistratus (four-eye butterfly fish)
            GenEMBL U19855 (2552bp)
            Vrolijk,N.H., Lin,C. and Chen,T.T.
            Characterization and expression of a CYP1A gene from the tropical
            teleost, Chaetodon capistratus.
            Unpublished 1995

CYP1A     Dicentrarchus labrax (european sea bass)
            GenEMBL U78316(1563bp)
            Stien,X., Amichot,M., Berge,J.-B. and Lafaurie,M.
            Molecular cloning of a CYP1A cDNA from the teleost fish
            Dicentrarchus labrax.
            Unpublished (1995)

CYP1A       Microgadus tomcod (Atlantic tomcod)
            GenEMBL L41886 (2497bp) L41917
            Roy,N.K., Konkle,B.A., Kreamer,G.-L., Grunwald,C. and Wirgin,I.I.
            Characterization and prevalence of a polymorphism in the 3'
            untranslated region of cytochrome P4501A1 in cancer-prone Atlantic tomcod
            Arch. Biochem. Biophys. (1995) In press
            probable frameshift detected by O. Gotoh. in the beginning of the sequence.

CYP1A       Microgadus tomcod (Atlantic tomcod)
            GenEMBL  L41917 (6837bp)
            Roy,N.K., Konkle,B. and Wirgin,I.I.
            Functional characterization of Cytochrome P4501A1 regulatory
            sequences in cancer-prone Atlantic tomcod.
            Unpublished (1995)

CYP1A       Pagrus major (wild read sea bream)
            no accession number
            Mizukami,M., Okauchi,M., Ariyoshi,T. and Kito,H.
            The isolation and sequence of cDNA encoding a 3-methylcholanthrene-
            inducible cytochrome P450 from wild red sea bream, Pagrus major.
            Marine Biol. 120, 343-349 (1994)

CYP2b      scup (fish Stenotomus chrysops)
            N-terminal fragment (20 amino acids)
            Klotz et al. Arch. Biochem. Biophys.  249, 326-338 (1986)

CYP2K1      Onchorhynchus mykiss (rainbow trout)
            GenEMBL L11528 (1853bp) PIR S45644 (504 amino acids)
            Buhler,D.R., Yang,Y.-H., Dreher,T.W., Miranda,C.L. and 
            Wang,J.-L.
            Cloning and sequencing of the major rainbow
            trout constitutive cytochrome P450 (P450 2K1): Identification
            of a new P450 gene subfamily and its expression in mature 
            rainbow trout liver and trunk kidney.
            Arch. Biochem. Biophys. 312, 45-51 (1994)

CYP2K1v2      Onchorhynchus mykiss (rainbow trout)
            no accession number
            Buhler,D.R.
            note: 98.6% identical to 2K1 may be an allele (5L1FL)
            submitted to nomenclature committee

CYP2K1v3      Onchorhynchus mykiss (rainbow trout)
            no accession number
            Buhler,D.R.
            note: 98.4% identical to 2K1 may be an allele (5L6FL)
            submitted to nomenclature committee

CYP2K2      Fundulus heteroclitus (killifish)
            John Stegeman
            submitted to nomenclature committee

CYP2K3      Onchorhynchus mykiss (rainbow trout)
            no accession number
            Buhler,D.R.
            (5L7FL) 96.5% identical to 2K1
            submitted to nomenclature committee

CYP2M1      Onchorhynchus mykiss (rainbow trout)
            GenEMBL U16657
            Yang,Y.H., Wang,J.L. and Buhler,D.R.
            cDNA cloning and characterization of a novel cytochrome P450 from rainbow 
            trout.
            Abstracts of the VII International Congress of Toxicology, 
            Vol. 7, No. 1, 10-P-2 (1995)
            Note: 42% identical to CYP2K1

CYP2N1       Fundulus heteroclitus (killifish)
            John Stegeman
            submitted to nomenclature committee

CYP2N2        Fundulus heteroclitus (killifish)
            John Stegeman
            submitted to nomenclature committee

CYP2P1         Fundulus heteroclitus (killifish)
            John Stegeman
            submitted to nomenclature committee

CYP2P2        Fundulus heteroclitus (killifish)
            John Stegeman
            submitted to nomenclature committee

CYP2P3        Fundulus heteroclitus (killifish)
            John Stegeman
            submitted to nomenclature committee

CYP3A27     Oncorhynchus mykiss (rainbow trout)
            no accession number
            Don R. Buhler
            submitted to Nomenclature Committee 
            56% identical to 3A12

CYP4T1      Oncorhynchus mykiss (rainbow trout)
           no accession number
           Patrick Falckh
           submitted to nomenclature committee
           closest resemblance to CYP4B

CYP11A1     Oncorhynchus mykiss (rainbow trout)
            GenEMBL S57305 (1789bp) Swiss Q07217 (514 amino acids)
            PIR S32197 (514 amino acids)
            Takahashi,M., Tanaka,M., Sakai,N., Adachi,S., Miller,W.L. 
            and Nagahama,Y.
            Rainbow trout ovarian cholesterol side-chain cleavage
            cytochrome P450 (P450scc).  cDNA cloning and mRNA expression 
            during oogenesis.
            FEBS Lett. 319, 45-48 (1993)

CYP11A1      Dasyatis americana (southern stingray)
            GenEMBL U63299(4619bp)
            Nunez,B.S. and Trant,J.M.
            Isolation of the cDNA encoding the interrenal form of cholesterol
            side chain cleavage cytochrome P450 of the southern stingray
            (Dasyatis americana).
            unpublished (1996)

CYP17       Oncorhynchus mykiss (rainbow trout)
            GenEMBL S50356
            Sakai,N., Tanaka,M., Adachi,S., Miller,W.L. and Nagahama,Y.
            Rainbow trout cytochrome P-450c17 (17 alpha-hydroxylase/17-20
            lyase) cDNA cloning, enzymatic properties and temporal pattern of 
            ovarian P-450c17 mRNA expression during oogenesis.
            FEBS Lett. 301, 60-64 (1992)
            Note: have not been able to download from NCBI

CYP17       Oncorhynchus mykiss (rainbow trout)
            GenEMBL X65800 (2287bp) Swiss P30437 (514 amino acids)
            Sakai,N., Tanaka,M., Adachi,S., Miller,W.L. and Nagahama,Y.
            Rainbow trout cytochrome P-450c17 (17
            alpha-hydroxylase/17,20-lyase). cDNA cloning, enzymatic properties
            and temporal pattern of ovarian P-450c17 mRNA expression during
            oogenesis
            FEBS Lett. 301, 60-64 (1992)

CYP17      Oryzias latipes (medaka)
            GenEMBL D87121(2421bp)
            Kobayashi,D., Matsuyama,M., Tanaka,M., Fukada,S. and Nagahama,Y.
            Structural analysis of medaka P-450c17 and expression in the
            ovarian follicle.
            unpublished (1996)

CYP17      Oryzias latipes (medaka)
            GenEMBL D87122(2302bp)
            Kobayashi,D., Tanaka,M., Fukada,S. and Nagahama,Y.
            Presence of a Novel Cytochrome P-450c17 Transcripts in Medaka
            Gonads
            unpublished (1996)

CYP17       Squalus acanthias (dogfish)
             GenEMBL S77384 (1964bp)
            Trant,J.
             Isolation and characterization of the cDNA encoding the spiny dogfish shark
            (Squalus acanthias) form of cytochrome P450c17
             J. Exp. Zool. 272, 25-33 (1995)

CYP19       Ictalurus punctatus (channel catfish)
            GenEMBL S75715(2102bp)
            Trant,J.
            Isolation and characterization of the cDNA encoding the channel
            catfish (Ictalurus punctatus) form of cytochrome P450arom
            Gen. Comp. Endocrinol. 95 (2), 155-168 (1994)

CYP19       Onchorynchus mykiss (rainbow trout)
            Tanaka, M., Telecky, T.M., Fukada, S., Adachi,S., Chen, S. and Nagahama, Y.
             Cloning and sequence analysis of the cDN A encoding P-450 aromatase 
             (P450arom) from a rainbow trout (Onchorynchus mykiss) ovary, relationship 
             between the amount of P450arom mRNA and the production of oestradiol-17-beta 
             in the ovary.
             J. Mol. Endocrin. 8, 53-61 (1992)

CYP19      Carassius auratus (goldfish)
            GenEMBL U18974(2939bp)
            Gelinas,D.M., Pitoc,G.A. and Callard,G.V.
            Isolation of goldfish brain aromatase cDNA and analysis of
            expression during the reproductive cycle and after steroid
            treatment in vivo.
            unpublished (1996)

CYP19       Oryzias latipes (medaka)
            GenEMBL D82968(1851bp)
            Tanaka,M., Fukada,S., Matsuyama,M. and Nagahama,Y.
            Structure and promoter analysis of the cytochrome P-450 aromatase
            gene of the teleost fish, medaka (Oryzias latipes)
            J. Biochem. 117 (4), 719-725 (1995)

CYP19      Tilapia nilotica (Cichlid fish)
            GenEMBL U72071(1804bp)
            Chang,X.T., Kobayashi,T., Nakamura,M., Kajura,H. and Nagahama,Y.
            Isolation and characterization of cDNA encoding the tilapia
            (Oreochromis niloticus) cytochrome P450 aromatase (P450arom):
            Changes in P450arom mRNA, protein and enzyme activity in ovarian
            follicles during oogenesis.
            J. Mol. Endocrinol. (1996) In press

CYP26      zebra fish
            GenEMBL U68234 
            White, J.A., Guo, Y.-D., Baetz, K., Beckett-Jones, B., Bonasoro, J.
            Hsu, K.E., Dilworth, F.E., Jones, G. and Petkovich, M. 
            Identification of the retinoic acid-inducible all trans retinoic acid 4-hydroxylase.
            J. Biol. Chem. 271, 29922-29927 (1996) 
            Note: new family in vertebrates, homolog to human ESTs R51129 and R21282

Unidentified fragment

            Oncorhynchus mykiss (trout)
            GenEMBL T23107 (310bp)
            Gong,Z.
            unpublished (1994)
            Note: 45.1% identical to 52A10, with similarity to other 52 family members