Items where Author is "Ramakumar, S."

Article

Chauhan, V. S. ; Gupta, M. ; Bagaria, A. ; Mishra, A. ; Mathur, P. ; Basu, A. ; Ramakumar, S. (2007) Self-assembly of a dipeptide- containing conformationally restricted dehydrophenylalanine residue to form ordered nanotubes Advanced Materials, 19 (6). pp. 858-861. ISSN 0935-9648

Chauhan, V. S. ; Mathur, Puniti ; Ramagopal, U. A. ; Ramakumar, S. ; Jagannathan, N. R. (2006) Stabilization of unusual structures in peptides using α,β-dehydrophenylalanine: crystal and solution structures of Boc-Pro-ΔPhe-Val-ΔPhe-Ala-OMe and Boc-Pro-ΔPhe-Gly-ΔPhe-Ala-OMe Biopolymers: Peptide Science, 84 (3). pp. 298-309. ISSN 0006-3525

Manikandan, K. ; Bhardwaj, Amit ; Ghosh, Amit ; Reddy, V. S. ; Ramakumar, S. (2005) Crystallization and preliminary x-ray study of a family 10 alkali thermostable xylanase from alkalophilic Bacillus sp. strain NG-27 Acta Crystallographica Section F, 61 (8). pp. 747-749. ISSN 1744-3091

Bagaria, A. ; Ramakumar, S. ; Gupta, M. ; Chauhan, V. S. (2005) Cyclo(l-leucyl-α,β-dehydro-phenyl-alanine): the first diketopiperazine containing an α,β-dehydro-phenyl-alanine residue Acta Crystallographica Section C, 61 (3). pp. o174-o176. ISSN 0108-2701

Gupta, Kshitiz ; Thomas, Dina ; Vidya, S. V. ; Venkatesh, K. V. ; Ramakumar, S. (2005) Detailed protein sequence alignment based on spectral similarity score (SSS) BMC Bioinformatics, 6 (1). Article ID 105, 16 pages. ISSN 1471-2105

Chauhan, V. S. ; Mathur, Puniti ; Ramakumar, S. (2004) Peptide design using α,β-dehydro amino acids: from β-turns to helical hairpins Biopolymers: Peptide Science, 76 (2). pp. 150-161. ISSN 0006-3525

Chauhan, V. S. ; Padyana, Anil K. ; Ramakumar, S. ; Mathur, Puniti ; Jagannathan, N. R. (2003) Role of a two-residue spacer in an α,β-didehydrophenylalanine containing hexapeptide: crystal and solution structure of Boc-Val-ΔPhe-Leu-Ala-ΔPhe-Ala-OMe Journal of Peptide Science, 9 (1). pp. 54-63. ISSN 1075-2617

Rudresh, ; Jain, Rinku ; Dani, Vardhan ; Mitra, Ashima ; Srivastava, Sarika ; Sarma, Siddhartha P. ; Varadarajan, R. ; Ramakumar, S. (2002) Structural consequences of replacement of an α- helical pro residue in Escherichia coli thioredoxin Protein Engineering, 15 (8). pp. 627-633. ISSN 0269-2139

Padyana, Anil K. ; Bhat, Vadiraja B. ; Madyastha, K. M. ; Rajashankar, K. R. ; Ramakumar, S. (2001) Crystal structure of a light-harvesting protein C-phycocyanin from Spirulina platensis Biochemical and Biophysical Research Communications, 282 (4). pp. 893-898. ISSN 0006-291X

Natesh, R. ; Bhanumoorthy, P. ; Vithayathil, P.J. ; Sekar, K. ; Ramakumar, S. ; Viswamitra, M.A. (1999) Crystal structure at 1.8 Å resolution and proposed amino acid sequence of a thermostable xylanase from Thermoascus aurantiacus Journal of Molecular Biology, 288 (5). pp. 999-1012. ISSN 0022-2836

Chauhan, V. S. ; Ramagopal, U. A. ; Ramakumar, S. ; Joshi, R. M. (1998) Crystal structure of Boc-LAla-ΔPhe-ΔPhe-ΔPhe-ΔPhe-NHMe: a left-handed helical peptide The Journal of Peptide Research, 52 (3). pp. 208-215. ISSN 1397-002X

Rajashankar, K. R. ; Ramakumar, S. ; Jain, R. M. ; Chauhan, V. S. (1997) Role of two consecutive α,β-dehydrophenylalanines in peptide structure: crystal and molecular structure of Boc-Leu-ΔPhe-ΔPhe-Ala-Phe-NHMe Biopolymers, 42 (3). pp. 373-382. ISSN 0006-3525

Chauhan, Virander Singh ; Jain, R. M. ; Rajashankar, K. R. ; Ramakumar, S. (1997) First observation of left-handed helical conformation in a dehydro peptide containing two L-Val residues. crystal and solution structure of Boc-L-Val-ΔPhe-ΔPhe-ΔPhe-L-Val-OMe Journal of the American Chemical Society, 119 (14). pp. 3205-3211. ISSN 0002-7863

Rajashankar, K. R. ; Ramakumar, S. ; Jain, R. M. ; Chauhan, V. S. (1996) Helix termination and chain reversal: crystal and molecular structure of the alpha, beta-dehydrooctapeptide Boc-Val-DeltaPhe-Phe-Ala-Leu-Ala-DeltaPhe-Leu-OH Journal of Biomolecular Structure & Dynamics, 13 (4). pp. 641-647. ISSN 0739-1102

Chauhan, Virander Singh ; Rajashankar, K. R. ; Ramakumar, S. (1995) Crystal and molecular structure of Boc-Phe-Val-OMe; comparison of the peptide conformation with its dehydro analogue International journal of peptide and protein research, 46 (6). pp. 487-493. ISSN 0367-8377

Rajashankar, K. R. ; Ramakumar, S. ; Jain, R. M. ; Chauhan, V. S. (1995) Observation of water-mediated helix-terminating conformation in a dehydrophenylalanine peptide: crystal and solution structure of the octapeptide Ac-ΔPhe-Val-ΔPhe-Phe-Ala-Val-ΔPhe-Gly-OMe Journal of the American Chemical Society, 117 (47). pp. 11773-11779. ISSN 0002-7863

Chauhan, Virander Singh ; Rajashankar, K. R. ; Ramakumar, S. ; Jain, R. M. (1995) First observation of an α-helix in α, β-dehydrooligopeptides: crystal structure of Boc-Val-ΔPhe-Ala-Leu-Gly-OMe Journal of the American Chemical Society, 117 (40). pp. 10129-10130. ISSN 0002-7863

Chauhan, Virander Singh ; Rajashankar, K. R. ; Ramakumar, S. ; Mal, T. K. ; Jain, R. M. (1995) Synthesis, and crystal and molecular structure of the 3₁₀-helical α,β-dehydro pentapeptide Boc-Leu-Phe-Ala-ΔPhe-Leu-Ome Biopolymers, 35 (2). pp. 141-147. ISSN 0006-3525

Viswamitra, M.A. ; Bhanumoorthy, P. ; Ramakumar, S. ; Manjula, M.V. ; Vithayathil, P.J. ; Murthy, S.K. ; Naren, A.P. (1993) Crystallization and preliminary X-ray diffraction analysis of crystals of Thermoascus aurantiacus Xylanase Journal of Molecular Biology, 232 (3). pp. 987-988. ISSN 0022-2836

Rama Rao, A. V. ; Ashok Reddy, K. ; Srinivas, N. R. ; Gurjar, M. K. ; Padmaja, N. ; Ramakumar, S. ; Viswamitra, M. A. ; Swapna, G. V. T. ; Jagannadh, B. ; Kunwar, A. C. (1993) Chiral polyhydroxylated tetrahydrothiophene derivatives: Novel synthesis and structural elucidation by X-ray crystallography, NMR spectroscopy and molecular mechanics calculations Journal of the Chemical Society, Perkin Transactions 1, 1993 (11). pp. 1255-1259. ISSN 0368-1769

Chauhan, V. S. ; Rajashankar, K. R. ; Ramakumar, S. (1992) Design of a Helical Motif using α, β -dehydrophenylalanine residues: crystal structure of Boc-Val-ΔPhe-Phe-Ala-Phe-ΔPhe-Val-ΔPHe-Gly-OCH, a 3-helical nonapeptide Journal of the American Chemical Society, 114 (23). pp. 9225-9226. ISSN 0002-7863

Neela, B. S. ; Manjula, M. V. ; Ramakumar, S. ; Balasubramanian, D. ; Viswamitra, M.A. (1990) Conformation of cyclolinopeptide dihydrate: An antamanide analogue Biopolymers, 29 (10-11). pp. 1499-1501. ISSN 0006-3525

Padmaja, N. ; Ramakumar, S. ; Viswamitra, M. A. (1990) Space-group frequencies of proteins and of organic compounds with more than one formula unit in the asymmetric unit Acta Crystallographica Section A, 46 (9). pp. 725-730. ISSN 0108-7673

Lalitha, H. N. ; Ramakumar, S. ; Viswamitra, M. A. (1989) Structure of 5-methyl-2'-deoxycytidine 5'-monophosphate dihydrate Acta Crystallographica Section C, 45 (10). pp. 1652-1655. ISSN 0108-2701

Padmaja, N. ; Ramakumar, S. ; Viswamitra, M. A. (1987) Reinvestigation of the structure of 2-hydroxyquinoxaline Acta Crystallographica Section C, 43 (11). pp. 2239-2240. ISSN 0108-2701

Padmaja, N. ; Ramakumar, S. ; Viswamitra, M. A. (1987) Structure of 5-methylcytosine hydrochloride Acta Crystallographica Section C, 43 (11). pp. 2157-2160. ISSN 0108-2701

Suguna, K. ; Ramakumar, S. ; Nagaraj, R. ; Balaram, P. (1985) Structure of cyclo(-α-aminoisobutyryl-L-phenylalanyl-), CHNO Acta Crystallographica Section C: Crystal Structure Communications, 41 (2). pp. 284-286. ISSN 0108-2701

Ramakumar, S. ; Venkatesan, K. ; Tandon, J. S. ; Dhar, M. M. (1985) Molecular and crystal structure of Coleonol, C₂₂H₃₄O₇ Zeitschrift fur Kristallographie, 173 (1-2). pp. 81-86. ISSN 0044-2968

Suguna, K. ; Ramakumar, S. ; Shamala, N. ; Prasad, B. V. Venkataram ; Balaram, P. (1982) Crystal structures of diketopiperazines containing α-aminoisobutyric acid: Cyclo(Aib-Aib) and cyclo(Aib-L-Ile) Biopolymers, 21 (9). pp. 1847-1855. ISSN 0006-3525

Kannan, K. K. ; Cid, H. ; Ramanadham, M. ; Sinh, S. ; Ramakumar, S. (1981) Structure and function of presynaptic neurotoxins: notexin and notechis II-5 Acta Crystallographica Section A Foundations of Crystallography, 37 . p. C23. ISSN 0108-7673

Ramakumar, S. ; Venkatesan, K. ; Rao, S. T. (1977) The crystal and molecular structure of 1-(diphenylmethyl)azetidin-3-ol Acta Crystallographica - Section B: Structural Crystallography & Crystal Chemistry, 33 (3). pp. 824-829. ISSN 0567-7408

Marsh, R. E. ; Ramakumar, S. ; Venkatesan, K. (1976) The crystal and molecular structure of glycyl-DL-phenylalanine Acta Crystallographica - Section B: Structural Crystallography & Crystal Chemistry, 32 (1). pp. 66-70. ISSN 0567-7408