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Sequential 2'-O-methylation of Archaeal pre- tRNATrp nucleotides is guided by the intron-encoded but trans-acting box C/D ribonucleoprotein of pre- tRNA. J. Biol. Chem. 279: 47661-47671. Edmondson, S. P., M. A. Kahsai, R. Gupta and J. W. Shriver. 2004. Characterization of Sac10a, a hyperthermophile DNA binding protein from Sulfolobus acidocaldarius. Biochemistry 43: 13026-13036. Teale , M. J., M. Kahsai, S. K. Singh, S. P. Edmondson, R. Gupta, J. W. Shriver and E. Meehan. 2003. Cloning, expression, crystallization and preliminary X-ray analysis of the DNA-binding protein Sso 10a from Sulfolobus solfataricus. Acta Cryst. D59: 1320-1322. Salgia , S. R., S. K. Singh, P. Gurha and R. Gupta. 2003. Two reactions of Haloferax volcanii RNA splicing enzymes: Joining of exons and circulrization of introns. RNA 9: 319-330. Zofallova , L., Y. Guo and R. Gupta. 2000. Junction phosphate is derived from the precursor in the tRNA spliced by the archaeon Haloferax volcanii cell extract. RNA 6:1019-1030. Gomes, I. and R. Gupta. 1997. RNA splicing ligase activity in the archaeon Haloferax volcanii. Biochem. Biophys. Res. Commun. 237:588-594. McAfee, J. G., S. P. Edmondson, P. K. Datta, J. W. Shriver and R. Gupta. 1995. Gene cloning, expression, and characterization of the Sac7 proteins from the hyperthermophile Sulfolobus acidocaldarius. Biochemistry 34:10063-10077. Gupta, R. 1995. Preparation of transfer RNA, aminoacyl-tRNA synthetases and tRNAs specific for an amino acid from extreme halophiles. In: Archaea: a laboratory manual ; Section: Halophiles. F. T. Robb, A. R. Place, K. R. Sowers, H. J. Schreier, S. DasSarma and E. M. Fleischmann, Eds., Cold Spring Harbor Laboratory Press, Cold Spring Harbor, New York, pp. 119-131. Gregson , J. M., P. F. Crain, C. G. Edmonds, R. Gupta, T. Hashizume, D. W. Phillipson and J. A. McCloskey. 1993. Structure of the archaeal transfer RNA nucleoside G*-15 (2-Amino-4 ,7-dihydro-4-oxo-7- -D-ribofuranosyl-1H-pyrrolo[2,3-d]pyrimidine-5-carboximidamide ( Archaeosine)). J. Biol. Chem. 268:10076-10086 . Reddy, D. M., P. F. Crain, C. G. Edmonds, R. Gupta, T. Hashizume, K. O. Stetter, F. Widdel and J. A. McCloskey. 1992. Structure determination of two new amino acid-containing derivatives of adenosine from tRNA of thermophilic bacteria and archaea. Nucleic Acids Res. 20:5607-5615. Edmonds, C. G., P. F. Crain, R. Gupta, T. Hashizume, C. H. Hocart, J. A. Kowalak, S. C. Pomerantz, K. O. Stetter and J. A. McCloskey. 1991. Posttranscriptional modification of tRNA in thermophilic archaea ( archaebacteria). J. Bacteriol. 173:3138-3148. Datta , P. K., L. K. Hawkins and R. Gupta. 1989. Presence of an intron in elongator methionine - tRNA of Halobacterium volcanii. Can. J. Microbiol. 35:189-194. Achenbach-Richter, L., R. Gupta, W. Zillig and C. R. Woese. 1988. Rooting the archaebacterial tree: the pivotal role of Thermococcus celer in archaebacterial evolution. System. Appl. Microbiol. 10:231-240. McCloskey, J. A., C. G. Edmonds, R. Gupta, T. Hashizume, C. H. Hocart and K. O. Stetter. 1988. Characterization and synthesis of a new nucleoside from archaebacterial transfer RNA: 1 ,2'-O-dimethylinosine. Nucleic Acids Res. Symp. Series 20:45-46. Sargent , M., R. Zahn, B. Walters, R. Gupta and B. Kaine. 1988. Nucleotide sequence of 18S rDNA from the microalga Nanochlorum eucaryotum. Nucleic Acids Res. 16:4156. Edmonds , C. G., P. F. Crain, T. Hashizume, R. Gupta, K. O. Stetter and J. A. McCloskey. 1987. Structural characterization of four ribose- methylated nucleosides from transfer RNA of extremely thermophilic archaebacteria. J. Chem. Soc., Chem. Commun. 1987:909-910. McCloskey, J. A., P. F. Crain, C. G. Edmonds, R. Gupta, T. Hashizume, D. W. Phillipson and K. O. Stetter. 1987. Structure determination of a new fluorescent tricyclic nucleoside from archaebacterial tRNA. Nucleic Acids Res. 15:683-693. Achenbach-Richter, L., R. Gupta, K. O. Stetter and C. R. Woese. 1987. Were the original eubacteria thermophiles? System. Appl. Microbiol. 9:34-39. Gupta, R. 1986. Transfer RNAs of Halobacterium volcanii: Sequences of five leucine and three serine tRNAs. System. Appl. Microbiol. 7:102-105. Olsen, G. J., N. R. Pace, M. Nuell, B. P. Kaine, R. Gupta and C. R. Woese. 1985. Sequence of the 16S rRNA gene from the thermoacidophilic archaebacterium Sulfolobus solfataricus and its evolutionary implications. J. Mol. Evol. 22:301-307. Daniels, C. J., R. Gupta and W. F. Doolittle. 1985. Transcription and excision of a large intron in the tRNA Trp gene of an archaebacterium, Halobacterium volcanii. J. Biol. Chem. 260:3132-3134. Gupta, R. 1985. Transfer ribonucleic acids of archaebacteria. In: The Archaebacteria; the Bacteria: A Treatise on Structure and Function, Vol. 8. C. R. Woese and R. S. Wolfe, Eds., Academic Press, New York, pp. 311-343. Kop, J., A. M. Kopylov, L. Magrum, R. Siegel, R. Gupta, C. R. Woese and H. F. Noller. 1984. Probing the structure of 16S ribosomal RNA from Bacillus brevis. J. Biol. Chem. 259:15287-15293. Woese , C. R., E. Stackebrandt, W. G. Weisburg, B. J. Paster, M. T. Madigan, V. J. Fowler, C. M. Hahn, P. Blanz, R. Gupta, K. H. Nealson and G. E. Fox. 1984. The phylogeny of purple bacteria: The alpha subdivision. System. Appl. Microbiol. 5:315-326. Kop, J., V. Wheaton, R. Gupta, C. R. Woese and H. F. Noller. 1984. Complete nucleotide sequence of a 23S ribosomal RNA gene from Bacillus stearothermophilus. DNA 3:347-357. Woese , C. R., R. Gupta, C. M. Hahn, W. Zillig and J. Tu. 1984. The phylogenetic relationships of three sulfur dependent archaebacteria. System. Appl. Microbiol. 5:97-105. Gupta, R. 1984. Halobacterium volcanii tRNAs: Identification of 41 tRNAs covering all amino acids, and the sequences of 33 class I tRNAs. J. Biol. Chem. 259:9461-9471. Woese , C. R., R. Gutell, R. Gupta and H. F. Noller. 1983. Detailed analysis of the higher-order structure of 16S-like ribosomal ribonucleic acids. Microbiol. Rev. 47:621-669. Jones, W. J., M. J. B. Paynter and R. Gupta. 1983. Characterization of Methanococcus maripaludis sp. nov., a new methanogen isolated form salt marsh sediment. Arch. Microbiol. 135:91-97. Kaine , B. P., R. Gupta and C. R. Woese. 1983. Putative introns in tRNA genes of prokaryotes. Proc. Natl. Acad. Sci. USA 80:3309-3312. Gupta, R., J. M. Lanter and C. R. Woese. 1983. Sequence of the 16S ribosomal RNA from Halobacterium volcanii, an archaebacterium. Science 221:656-659. Yamaizumi , A., M. Ihara, Y. Kuchino, R. Gupta, C. R. Woese and S. Nishimura. 1982. Archaebacterial tRNA contains 1-methylinosine at residue 57 in T C-loop. Nucleic Acids Res. Symp. Series 11:209-213 . Tanner, R. S., E. Stackebrandt, G. E. Fox, R. Gupta, L. J. Magrum and C. R. Woese. 1982. A phylogenetic analysis of anaerobic eubacteria capable of synthesizing acetate from carbon dioxide. Curr. Micrioiol. 7:127-132. Pang, H., M. Ihara, Y. Kuchino, S. Nishimura, R. Gupta, C. R. Woese and J. A. McCloskey. 1982. Structure of a modified nucleoside in archaebacterial tRNA which replaces ribosylthymine; 1-methylpseudouridine. J. Biol. Chem. 257:3589-3592. Noller , H. F., J. Kop, V. Wheaton, J. Brosius, R. R. Gutell, A. M. Kopylov, F. Dohme, W. Herr, D. A. Stahl, R. Gupta and C. R. Woese. 1981. Secondary structure model for 23S ribosomal RNA. Nucleic Acids Res. 9:6167-6189. Woese , C. R. and R. Gupta. 1981. Are archaebacteria merely derived "prokaryotes"? Nature 289:95-96. Woese , C. R., L. J. Magrum, R. Gupta, R. B. Siegel, D. A. Stahl, J. Kop, N. Crawford, J. Brosius, R. Gutell, J. J. Hogan and H. F. Noller. 1980. Secondary structure model for bacterial 16S ribosomal RNA: Phylogenetic, enzymatic and chemical evidence. Nucleic Acids Res. 8:2275-2293. Fox, G. E., E. Stackebrandt, R. B. Hespell, J. Gibson, J. Maniloff, T. A. Dyer, R. S. Wolfe, W. E. Balch, R. S. Tanner, L. J. Magrum, L. B. Zablen, R. Blakemore, R. Gupta, L. Bonen, B. J. Lewis, D. A. Stahl, K. R. Luehrsen, K. N. Chen and C. R. Woese. 1980. The phylogeny of prokaryotes. Science 209:457-463. Gupta, R. and C. R. Woese. 1980. Unusual modification patterns in the transfer ribonucleic acids of archaebacteria. Curr. Microbiol. 4:245-249. Gibson, J., E. Stackebrandt, L. B. Zablen, R. Gupta and C. R. Woese. 1979. A phylogenetic analysis of the purple photosynthetic bacteria. Curr. Microbiol. 3:59-64. Gupta, R. and A. S. Mukherjee. 1977. Characterization of crossing over in males induced by X-irradiation in the pupal stage of Drosophila melanogaster. Proc. Zool. Soc., Calcutta 30:73-82.