52) Ehara, M., Kitayama,T., Watanabe, I. K., Inagaki, Y., Hayashi-Ishimaru, Y., and Ohama, T. (1999) Comprehensive molecular phylogenetic analysis of a heterokont alga (NIES 548) using genes from all three cellular compartments. Phycol. Res. 47, 225-231.
51) Watanabe, I. K., Ehara, E., Inagaki, Y., and Ohama, T. (1998) Distinctive origins of group I introns found in the COXI genes of three green algae. Gene 213, 1-7.
50) Inagaki, Y., Ehara, M., Watanabe, K, I., Hayashi-Ishimaru, Y. and Ohama, T. (1998) Directionally evolving genetic code: UGA codon from stop to tryptophan in mitochondria. J. Mol. Evol. 47, 378-384.
49) Ehara, M.,Watanabe, I. K., Kawai, H., Inagaki, Y., Hayashi-Ishimaru, Y., and Ohama, T. (1998) Distribution of the mitochondrial deviant genetic code, AUA for methionine, in heterokont alge. J. Phycology 34, 1005-1008.
48) Bessho, Y., Tamura, S., Hori, H., Tanaka, H., Ohama, T. , and Osawa, S. (1997) Planarian mitochondrial heterogeneity:Relationship between the type of mitochondrial cytochrome c oxidase subunit I gene sequence, karyotype and genital organ. Molecular Ecology 6, 129-136.
47) Ehara, M., Hayashi-Ishimaru, Y., Inagaki, Y. and Ohama, T. (1997) Use of a deviant mitochondrial genetic code in yellow-green algae as a landmark for segregating members within the phylum. J. Mol. Evolution 45, 119-124.
46) Inagaki, Y., Hayashi-Ishimaru, Y., Ehara, M., and Ohama, T. (1997) Algae or protozoa: Phylogenetic position of euglenophytes and dinoflagellates as inferred from mitochondrial sequences. J. Mol. Evolution 45, 295-300.
45) Hayashi-Ishimaru, Y., Ehara, M., Inagaki, Y. and Ohama, T. (1997) A deviant mitochondrial genetic code in prymnesiophytes (yellowalgae):UGA codon for tryptophan. Current Genetics, 32, 296-299.
44) Chittum, H. S., Baek, H. J., Diamond A. M., F-Salguero, P., Gonzalez, F., Ohama, T., Hatfield D. L., Kuehn, M., Lee, B-J. (1997) Selenocystein tRNA(Ser)Sec levels and selenium dependent glutathione peroxidase activity in mouse embryonic stem cell heterozygous for a targeted mutation in the tRNA(Ser)Sec gene. Biochemistry 36, 8634-8639.
43) Hayashi-Ishimaru, Y., Ohama, T., Kawatsu, Y., Nakamura, K. and Osawa, S. (1996) UAG is a sense codon in several chlorophycean mitochondria. Current Genetics 30, 29-33.
42) Su, Z-H., Ohama, T., Okada, T. S., Nakamura, K., Ishikawa, R. and Osawa, S. (1996) Phylogenetic relationships and evolution of the Japanese carabinae ground beetles based on mitochondrial ND5 gene sequences. J. Mol Evolution 42, 124-129.
41) Su, Z-H., Tominaga, O., Ohama, T., Kajiwara, E., Ishikawa, R., Okada, T. S., Nakamura, K., and Osawa, S. (1996) Parallel evolution in radiation of Ohmopterus ground beetles inferred from mitochondrial ND5 gene sequences. J. Mol. Evolution 43, 662-671.
40) Inagaki, Y., Kojima, A., Bessho, Y., Hiroshi, H., Ohama, T., and Osawa, S. (1995) Translation of synonymous codons in family boxes by Mycoplasma capricolum tRNA with unmodified uridine or adenine at the first anticodon position. J. Mol. Biol. 251, 486-492.
39) Su, Z-H., Ohama, T., Okada, T S., Nakamura, K., Ishikawa, R. and Osawa, S. (1995) Geography-linked phylogeny of the Damaster from mitochondrial ND5 gene sequences. J. Mol. Evolution 42, 130-134.
38) Ohama, T., Jung J-E., Park, S-I., Clouse, A., Lee, B-J., and Haifield, D (1995) Identification of new selenosysteine tRNA(Ser)Sec isoacceptors in human cell lines. Biochemi. Mol. Biol. Int. 36, 421-427.
37) Ohama,T., Yang, D., and Hatfield, D (1994) Selenocysteine tRNA and serine tRNA are aminoacylated by the same synthetase, but may manifest different identities with respect to the long extra arm. Arch. Biochem. Biophysics 315, 293-301.
36) Jung, J-E., Karoor, V., Sandbaken M., Lee, B-J., Ohama, T., Gesteland, R., Atkins, J., Mullenbach, G., Hill, k., Wahba, A. and Hatfield, D (1994) Utilization of selenocysteyl-tRNA(Ser)Sec and seryl-tRNA(Ser)Sec in protein synthesis. J. Biol. Chem. 269, 29739-29745.
35) Hatfield, D., Choi, I-S., Ohama, T., Jung, J-E., and Diamond, A(1994) Selenocysteine tRNA(Ser)Sec Isoacceptor as central components in selenocystein biosynthesis in eukaryotes. Selenium in biology and human health. Raymond F. Burk ed. pp. 27-44, Springer-Verlag.
34) Ohama, T., Choi, I-S., Hatfield, D. and Johnson, K (1994) Mouse selenocysteine tRNA (Ser)Sec gene (TRSP) and its llocalization on chromosome 7. Genomics 19, 595-596.
33) Berry, M., Harney, J., Ohama, T. and Hatfield, D (1994) Selenocyateine insertion or termination: factors affecting the UGA codon fate and complementary anticodon: codon mutations. Nucl. Acids Res. 22, 3753-3759.
32) Kano, A., Ohama, T., Abe, R. and Osawa, S (1993) Unassigned or nonsense codons in Micrococcus luteus. J. Mol. Biol. 230, 51-56.
31) Ohama, T., Suzuki, T ., Mori, M., Osawa, S., Ueda, T., Watanabe, K and Nakase, T (1993) Non-univrsal decoding of the leucine codon CUG in ceveral Candida species. Nucl. Acids Res. 21, 4039-4045.
30) Watanabe, K., Ueda, T., Yokogawa, T., Suzuki,T., Nishikawa, K.,Mori, M., Ohama, T., Nakabayashi, H., Nakase, H. and Osawa, S(1993) Molecular mechanism of the genetic code found in Candida species and its implications in evolution of the genetic code. The translational apparatus Nierhaus K. H. ed. pp.647-656, Plenum press (New York).
29) Suzuki, T., Ueda, T., Ohama, T., Osawa, S. and Watanabe, K(1993) The gene for serine tRNA having anticodon sequence CAG in pathogenic yeast, Candida albicans. Nucl. Acids Res. 21, 356.
28) Yokogawa, T., Suzuki, T., Ueda, T., Mori, M., Ohama, T., Kuchino, Y., Yoshinari, S., Motoki, I., Nishikawa, K., Osawa, S. and Watanabe, K (1992) Serine tRNA for translation of non-universal codon CUG in Candida cylindracea: Evolutionary implications. Proc. Natl. Acad. Sci. USA. 89, 7408-7411.
27) Bessho, Y., Ohama, T. and Osawa, S (1992) Planarian mitochondria I. Heterogeneity of cytochrome c oxidase subunit I gene sequences in the fresh water planarian, Dugesia japonica. J. Mol. Evol. 34, 324-330.
26) Bessho, Y., Ohama, T. and Osawa, S (1992) Planarian mitochondria II. The unique genetic code as deduced from cytochrome c oxidase subunit I gene sequences. J. Mol. Evol. 34, 331-335.
25) Muto, A., Ohama, T., Andachi, Y., Yamao, F., Tanaka, R and Osawa, S (1991) Evolution of codons and anticodons in eubacteria. New aspects of the genetics of molecular evolution. Kimura, M. and Takahata, N. ed. pp. 179-193, Japan Sci. Soc. Press (Tokyo).
24) Kano, A., Andachi, Y., Ohama, T. and Osawa, S (1991) Novel anticodon composition of transfer RNAs in Micrococcus luteus, a bacterium with a high genomic G+C-content: Correlation with codon usage. J. Mol. Biol. 221, 387-401.
23) Jukes, T. H., Bessho, Y., Ohama, T. and Osawa, S (1991) Release factors and genetic code (Scientific Correspondence). Nature 352, 575.
22) Ohama, T., Muto, A. and Osawa, S (1990) Role of GC-biased mutation pressure on synonymous codon choice in Micrococcus luteus, a bacterium with a high genomic GC-content. Nucleic Acids Res. 18, 1565-1569.
21) Ikeda, R., Ohama, T., Muto, A. and Osawa, S (1990) Nucleotide sequences of nine tRNA genes from Micrococcus luteus. Nucleic Acids Res. 18, 7154.
20) Ikeda, R., Ohama, T., Muto, A. and Osawa, S (1990) Nucleotide sequences of two tRNA gene clusters from Micrococcus luteus. Nucleic Acids Res. 18, 7155.
19) Ohama, T., Osawa, S., Watanabe, K. and Jukes, T. H (1990) Evolution of the mitochondrial genetic code IV. AAA as an asparagine code in some animal mitochondria. J. Mol. Evol. 30, 329-332.
18) Osawa, S., Muto, A., Ohama, T., Andachi, Y., Tanaka, R and Yamao, F (1990) Procaryotic genetic code. Genetic code 1990 EXPERIENTIA 46, 1097-1106.
17) Osawa, S., Muto, A, Jukes, T. H. and Ohama, T (1990) Evolutionary changes in the genetic code. Proc. R. Soc. London (B) 241, 19-28.
16) Ohama, T., Muto, A. and Osawa, S (1989) Spectinomycinoperon of Micrococcus luteus: Evolutionary implications of organization and novel codon usage. J. Mol. Evol. 29, 381-395.
15) Osawa, S., Collins, D., Ohama, T., Jukes, T. H. and Watanabe, K (1989) Evolution of the mitochondrial genetic code III. Reassignment of CUN codons from leucine to threonine during evolution of yeast mitochondria. J. Mol. Evol. 30, 322-328.
14) Osawa, S., Ohama, T., Jukes, T. H. and Watanabe, K. (1989) Evolution of the mitochondrial genetic code I. Origin of AGR serine and stop codons in metazoan mitochondria. J. Mol. Evol. 29, 202-207.
13) Osawa, S., Ohama, T., Jukes, T. H., Watanabe, K. and Yokoyama, S (1989) Evolution of the mitochondrial genetic code II: Reassignment of codon AUA from isolucine to a methionine. J. Mol. Evol. 29, 373-380.
12) Osawa, S., Collins, D., Ohama, T., Jukes, T. H. and Watanabe, K (1989) Evolution of the mitochondrial genetic code III: Reassignment of CUN codons from leucine to threonine during evolution of yeast mitochondria. J. Mol. Evol. 30, 322-328.
11) Nakayama, M., Fujita, N., Ohama, T., Osawa, S. and Ishihama, A. (1989) Micrococcus luteus, a bacterium with a high genomic G+C content, contains Escherichia coli-type promoters. Mol. Gen. Gent. 218, 384-389.
10) Ohama, T., Muto, A. and Osawa, S (1989) Synonymous codon choice in Micrococcus luteus. Proc. Japan Acad. 65, Ser. B, 178-181.
9) Osawa, S., Collins, D., Ohama, T., Jukes, T. H. and Watanabe, K (1989) Evolution of the mitochondrial genetic code III: Reassignment of CUN codons from leucine to threonine during evolution of yeast mitochondria. J. Mol. Evol. 30, 322-328.
8) Osawa, S., Ohama, T., Yamao, F., Muto, A., Jukes, T. H. , Ozeki, H. and Umesono, K. (1988) Directional mutation pres sure and transfer RNA in choice of the third nucleotide of synonymous twocodon sets. Proc. Natl. Acad. Sci. USA. 85,1124-1128.
7) Ohama, T., Yamao, F., Muto, A. and Osawa, S (1987) Organization and codon usage of the streptomycin operon in Micrococcus luteus, a bacterium with a high genomic G+C content. J. Bacteriol. 169, 4770-4777.
6) Osawa, S., Jukes, T. H., Muto, A., Yamao, F., Ohama, T. and Andachi, Y (1987) Role of directional mutation pressure in the evolution of the eubacterial genetic code. Cold Spring Harbor Symposia on Quantitative Biology, Vol. LII. 777-789.
5) Hori, H., Lim, B-l., Ohama, T., Kumazaki, T. and osawa, S (1985) Evolution of organisms deduced from 5S rRNA sequences. Population genetics and molecular evolution. Ohta, T. and Aoki, K. ed. pp. 369-384, Japan Scientific Societies Press (Tokyo).
4) Ohama, T., Kumazaki, T., Hori, H. and Osawa, S (1984) Evolution of multicellular animals as deduced from 5S rRNA sequences: a possible early emergence of the Mesozoa. Nucl. Acids Res. 12, 5101-5108.
3) Ohama, T., Kumazaki, T., Hori, H., Osawa, S. and Takai, M (1983) Fresh-water planarias and a marine planaria are relatively dissimilar in the 5S rRNA sequences. Nucl. Acids Res. 11, 473-476.
2) Ohama, T., Hori, H. and Osawa, S (1983) The nucleotide sequences of 5S rRNAs from a sea-cucumber, a starfish and a seaurchin. Nucl. Acids Res. 11, 5181-5184.
1) Hori. H., Ohama, T., Kumazaki, T. and Osawa, S (1982) Nucleotide sequences of 5S rRNAs from four jellyfishes. Nucl. Acids Res. 10, 7405-7408.