S. Ramakumar



List of Publications of Prof. S. Ramakumar
 

   1.  Patra AK, Bhowmick T, Roy S, Ramakumar S, Chakravarty AR. 2009.
        Copper(II) Complexes of l-Arginine as Netropsin Mimics Showing DNA
        Cleavage Activity in Red Light.

         Inorg Chem. [Epub ahead of print].

   2.   Parthiban M, Rajasekaran MB, Ramakumar S, Shanmughavel P. 2009
         Molecular Modeling of Human Pentameric alpha(7) Neuronal Nicotinic
         Acetylcholine Receptor and Its Interaction with its Agonist and Competitive Antagonist.

         J Biomol Struct Dyn. 26(5): 535 - 48.

   3.  Lahiri D, Bhowmick T, Pathak B, Shameema O, Patra AK, Ramakumar S,
        Chakravarty AR. 2009.
        Anaerobic photocleavage of DNA in red light by dicopper(II) complexes of
        3,3'-dithiodipropionic acid.

         Inorg Chem.48 (1): 339 - 49.

   4.  Patra AK, Bhowmick T, Ramakumar S, Nethaji M, Chakravarty AR. 2008.
        DNA cleavage in red light promoted by copper(II) complexes of alpha-amino acids
        and photoactive phenanthroline bases.

         Dalton Trans (48): 6966 - 76.

   5.  Ramakumar Suryanarayanarao, Tuhin Bhowmick, Soumitra Ghosh,
        Ramagopal A Udupi,Nagaraja Valakunja 2008.
        Crystal Structure and structure based drug design of HU (Histone like DNA binding
        protein) fromMycobacterium tuberculosis.

        Acta Cryst. (2008) P04.15.357,A64,C342.

   6.  Bharadwaj A, Leelavathi S, Mazumdar-Leighton S, Ghosh A, Ramakumar S, Reddy VS. 2008.
        The critical role of partially exposed N-terminal valine residue in stabilizing
        GH10 xylanase from Bacillius sp.NG - 27 under poly -extreme conditions.

         Plos One 3(8); e3063.

   7.  Roy M, Bhowmick T, Ramakumar S, Nethaji M, Chakravarty AR. 2008.
        Double-strand DNA cleavage from photodecarboxylation of (micro-oxo)
        diiron(III) L-histidine complex in visible light.

         Dalton Trans (27): 3542 - 5.

   8.  Gupta M, Acharya R, Mishra A, Ramakumar S,Ahmed F, Chauhan VS. 2008.
        Dehydrophenylalanine (DeltaPhe) as a beta breaker: extended structure terminated by
        a DeltaPhe - induced turn in the pentapeptide Boc - Phe1 - Ala2 - lle3 - DeltaPhe4 - Ala5 -         OMe.

        Chembiochem 9(9):1375 - 8.

   9.  Manikandan K, Pal D, Ramakumar S, Brener NE, Iyengar SS, Seetharam G. 2008.
         Functionally important segments in proteins dissected using Gene Ontology and
         geometric clustering of peptide fragments.

        Genome Biol. 9(3): R52.

   10.  Patra AK, Bhowmick T, Ramakumar S, Chakravarty AR. 2007.
        Metal - based netropsin mimics showing AT - selective DNA binding and DNA
        cleaving activity at red light.

        Inorg Chem. 46(22): 9030 - 2.

  11. Mondal S, Babu RM, Bhavna R, Ramakumar S. 2007.
        In silico detection of binding mode of J - super family conotoxin pI14a with Kv1.6 channel.
        In silico Biol 7(2): 175 - 86.

  12. Acharya R, Gupta M, Ramakumar S, Ramagopal UA, Chauhan VS. 2007.
        Observation of glycine zipper and unanticipated occurrence of ambidextrous helices
        in the crystal structure of a chiral undecapeptide.

        BMC Struct Biol 7:51.

  13. Mondal S, Bhavna R, Mohan Babu R, Ramakumar S. 2006.
        Pseudo amino acid composition and multi-class support vector machines approach
        for conotoxin superfamily classification.

        J. Theor Biol. 243(2): 252 - 60.

   14. Mondal S, Babu RM, Bhavna R, Ramakumar S. 2006.
         I-conotoxin superfamily revisted.
         J.pept Sci. 12(11): 679 - 85.

   15. Manikandan K, Bhardwaj A, Gupta N, Lokanath NK, Ghosh A, Reddy VS,
         Ramakumar S. 2006
         Crystal Structures of native and xylosaccharide-bound alkali thermostable xylanase
         from an alkalophillic Bacillus sp. NG - 27: Structural insights into alkalophilicity
         and implications for adaptation to ployextreme conditions.

         Protein Sci. 15(8):1951 - 60.

   16. Bagaria A, Surendranath K, Ramagopal UA, Ramakumar S, Karande AA 2006.
         Stucture - function analysis and insights into the reduced toxicity of Abrus precatorius
         agglutinin 1 in relation to abrin.

         J Biol Chem 281(45) 34465 - 74.

   17. Mathur P, Ramagopal UA, Ramakumar S, Jagannathan NR, Chauhan VS 2006.
         Stabilization of unusual structures in peptides using alpha, beta-dehydrophenylalanine:
         crystal and solution structures of Boc - Pro - ΔPhe - Val - ΔPhe-Ala-OMe and Boc-Pro -
        ΔPhe-Gly - ΔPhe-Ala-OMe.

        Biopolymers. 84, 298 - 309.

   18. Manikandan K, Jagtap S, Rao M, Ramakumar S, 2006.
         Crystallization and preliminary X - ray characterization of a thermostable
         low - molecular - weight 1,4 - beta - D - glucan glucohydrolase from an alkalothermophilic
         Thermomonospora sp.

         Acta Crystallograph Sect F Struct Biol Cryst Commun. 62 (Pt 4), 385 - 7.

   19. Padyana AK, Ramakumar S, 2006.
         Lateral energy transfer model for adjacent light-harvesting antennae rods of
         C - phycocyanins.

         Biochim Biophys Acta. 1757, 161 - 165.

   20. Manikandan K, Bhardwaj A, Ghosh A, Reddy VS, Ramakumar S 2005.
         Crystallization and preliminary X - ray study of a family 10 alkali - thermostable xylanase
         from alkalophilic Bacillus sp. strain NG - 27.

         Acta Crystallograph Sect F Struct Biol Cryst Commun. 61 (Pt 8), 747 - 9.

   21. Bagaria A, Ramakumar S, Gupta M, Chauhan VS 2005.
         Cyclo ( L - leucyl - α, &beta - dehydrophenylalanine) : the first diketopiperazine containing
         an &alpha, &beta - dehydrophenylalanine residue.

         Crystallogr C. 61 ( Pt 3 ): o174 - 6.

   22. Gupta K, Thomas D, Vidya SV, Venkatesh KV, Ramakumar S 2005.
         Detailed protein sequence alignment based on Spectral Similarity Score ( SSS ).
         BMC Bioinformatics. 6, 105.

   23. Rudresh, Gupta M, Ramakumar S, Chauhan VS 2005.
         Helix packing motif common to the crystal structures of two undecapeptides containing
         dehydrophenylalanine residues: implications for the de novo design of helical bundle
         super secondary structural modules.

         Biopolymers. 80, 617 - 27.

   24. Mondal S, Vijayan R, Shichina K, Babu RM, Ramakumar S. 2005
         I-superfamily conotoxins: sequence and structure analysis.
         In Silico Biol. 5, 557 - 71.

   25. Fernando SA, Selvarani P, Das S, Kumar ChK, Mondal S, Ramakumar S, Sekar K 2004
         THGS: a web - based database of Transmembrane Helices in Genome Sequences.
         Nucleic Acids Res. 32, D125 - 128.

   26. Rudresh, Ramakumar S, Ramagopal UA, Inai Y, Goel S, Sahal D, Chauhan VS 2004.
         De novo design and characterization of a helical hairpin eicosapeptide; emergence of
         an anion receptor in the linker region.

         Structure. 12, 389 - 96.

   27. Mathur P, Ramakumar S, Chauhan VS 2004.
         Peptide design using alpha, beta - dehydro amino acids: from beta - turns to
         helical hairpins.

         Biopolymers. 76, 150 - 61.

   28. Manikandan K, Ramakumar, S 2004.
         The occurrence of C--H...O hydrogen bonds in a-helices and helix termini in
         globular proteins.

         Proteins. 56, 768 - 81.

  29. Mondal S, Jaishankar SP, Ramakumar S. 2003.
         Role of context in the relationship between form and function: structural plasticity of some
         PROSITE patterns.

         Biochem Biophys Res Commun. 305, 1078 - 84.

   30. Padyana AK, Ramakumar S, Mathur P, Jagannathan NR, Chauhan VS. 2003.
         Role of a two - residue spacer in an alpha, beta - Didehydrophenylalanine containing
         hexapeptide: crystal and solution structure of Boc - Val - ΔPhe - Leu -Ala - ΔPhe - Ala -
         OMe.

         J. Pept. Sci. 9, 54 - 63.

   31. Natesh R, Manikandan K, Bhanumoorthy P, Viswamitra MA, Ramakumar S 2003.
         Thermostable xylanase from Thermoascus aurantiacus at ultrahigh resolution ( 0.89 A )
          at 100 K and atomic resolution ( 1.11 A ) at 293 K refined anisotropically to
          small - molecule accuracy.

         Acta Crystallogr D Biol Crystallogr. 59 ( Pt 1 ), 105 - 17.

   32. Kant S, Bagaria A, Ramakumar S 2002.
         Putative homeodomain proteins identified in prokaryotes based on pattern and sequence
         similarity.

         Biochem. Biophys. Res. Commun. 299, 229 - 32.

   33. Rudresh, Rinku J, Vardhan D, Ashima M, Sarika S, Siddhartha PS, Varadarajan R,
         Ramakumar S 2002.
         Structural consequences of replacement of an &alpha - helical Pro residue in Escherichia coli
         thioredoxin.

         Protein Engineering. 15, 623 - 33.

   34. Ramagopal UA, Ramakumar S, Mathur P, Joshi RM, Chauhan VS 2002.
         Dehydrophenylalanine zippers: strong helix-helix clamping through a network of
         weak interactions.

         Protein Engineering. 15, 331 - 335.

   35. Padayana AK, Bhat VB, Madyastha KM, Rajashankar KR, Ramakumar S. 2001.
         Crystal structure of a light harvesting protein c - phycocyanin from Spirulina platensis.
         Biochemical and Biophysical Research Communications. 282, 893 - 898.

   36. Ramagopal UA, Ramakumar S, Sahal D, Chauhan VS. 2001.
         De Novo Design and Characterization of an Apolar Helical Hairpin peptide at
         Atomic Resolution: Compaction Mediated by weak interactions.

         Proc. Natl. Acad. Sci ( USA ), 98, 870 - 874.

   37. Ramakumar S. 2000.
         Integrative Biology. Reprinted from a monograph on Integrative Biology published by
         Indian National Science Academy, INSA, New Delhi.

         Edited by Prof. S.C. Lakhotia, 21 - 24.

   38. Yu B-Z, Poi MJ, Ramagopal UA, Jain R,Ramakumar S, Beng O, Tsai M-D, Sekar K, Jain MK.
         2000.
         Structural Basis of the Anionic Interface Preference and K * cat Activation of Pancreatic
         Phospholipase A2.

         Biochemistry. 39, 12312 - 12323.

   39. Rinku J, Ramakumar S. 1999.
         Stochastic Dynamics Modeling of the Protein Sequence Length Distribution in Genomics:
         Implications for Microbial Evolution.

         Physica A 273, 476 - 485.

   40. Natesh R, Bhanumoorthy P, Vithayathil PJ, Sekar K, Ramakumar S, Viswamitra MA. 1999.
         Crystal Structure at 1.8 resolution and proposed amino acid sequence of a thermostable:
         xylanase from Thermoaascus aurantiacus.

         J. Mol. Biol. 288, 999 - 1012.

   41. Ramagopal UA,Ramakumar S, Joshi RM, Chauhan VS. 1998.
         Crystal Structure of Boc - L - Ala - ΔPhe - ΔPhe - ΔPhe - ΔPhe - NHMe: a left-handed
         helical peptide.

         J. Peptide Res. 52, 208 - 215.

   42. Jain RM, Rajashankar KR, Ramakumar S, Chauhan VS. 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.

         J. Am. Chem. Soc. 119, 3205 - 3211.

   43. Rajashankar KR, Ramakumar S, Jain RM, Chauhan VS. 1997.
         Role of two consecutive &alpha, &beta dehydrophenylalanine in peptide structure of Boc - Leu -
         ΔPhe- ΔPhe - Ala - Phe - NHMe.

         Biopolymers. 42, 373 - 382.

   44. Eswaran SV, Neela HY, Ramakumar S, Viswamitra MA. 1996.
         The unusual formation of Methyl &alpha - ( 5, 6 dimethoxycarbonyl - 2, 3 - dimethoxyazepin - 7 -
         ylidene ) - &alpha - ( 5 - methoxycarbonyl - 2, 3 - dimethoxypyrid - 6 - yl ) acetate during the
         pyrolysis of 'Azido-meta-hemipinate' First Example of a Reaction Involving a
         Concomitant Ring Expansion and Ring Extrusion.

         J. Heterocyclic Chem 33, 333 - 1337.

   45. Rajashankar KR,Ramakumar S, Jain RM, Chauhan VS. 1996.
         Schellman Motif in dehydrooligopeptides: Crystal and Molecular Structure of Boc - Val -
        ΔPhe - Leu &345 Phe - Ala - ΔPhe - Leu - OMe.

        Angew Chemie, English Edition 35, 765 -.

   46. Rajashankar KR, Ramakumar S. 1996.
         &pi - Turns in Proteins and Peptides: Classification, Conformation, Occurrence, Hydration
         and Sequence.

         Protein Science. 5, 932 - 946.

   47. Rajashankar KR, Ramakumar S, Jain RM, Chauhan VS. 1996.
         Helix termination and chain reversal: Crystal and molecular structure of the &alpha ,&beta -
         dehydrooctapeptide Boc- Val - ΔPhe - Phe - Ala - Leu - Ala - ΔPhe - Leu - OH.

         Journal of Biomolecular Structure and Dynamics. 13, 641 - 648.

   48. Ramakumar S, Viswamitra MA, Maruthi Mohan P, Sastry PS. 1995.
         X - ray Studies on the Bilayer Structure of Trypsin Treated Rat Brain Myelin.
         Current Science. 68, 136 - 140.

   49. Rajashankar KR, Ramakumar S, Chauhan VS. 1995.
         Crystal and Molecular Structure of Boc - Phe - Val - OMe; Comparison of the Peptide
         Conformation with it's Dehydro Analogue.

         Int. Journal. Pep. Prot. Res. 46, 487 - 493.

   50. Rajashankar KR, Ramakumar S, Jain RM, Chauhan VS. 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.

         J. Am. Chem. Soc. 117, 11773 - 11779.

   51. Rajashankar KR,Ramakumar S, Jain RM, Chauhan VS. 1995.
         First observation of &alpha - helix in &alpha ,&beta - dehydrooligopeptides; Crystal structure of Boc - Val -
         ΔPhe - Ala - Leu - Gly - OMe.

         Journal of American Chemical Society 117, 10129 - 10130.

   52. Rajashankar KR, Ramakumar S, Mal TK, Jain RM, Chauhan VS. 1995.
         Synthesis, crystal and molecular structure of the 310 - helical &alpha , &beta - dehydro pentapeptide
         Boc - Leu - Phe - Ala - ΔPhe - Leu - OMe.

         Biopolymers. 35, 141 - 147.

   53. Rajashankar KR, Ramakumar S, Mal TK, Chauhan VS. 1994.
         Synthesis, Crystal and Molecular Structure of Boc - Pro - δPhe - Ala - ΔPhe - Ala - OMe;
         A pentapeptide with a Novel beta bend Ribbon Structure.

         Angew Chemie, English Edition 33, 970 - 973.

   54. Viswamitra MA, Bhanumoorthy P, Ramakumar S, Manjula MV, Vithayathil PJ, Murthy SK,
         Naren AP. 1993.
         Crystallization and Preliminary X - ray Diffraction Analysis of Crystals of Thermoascus
          aurantiacus xylanase.

         J. Mol. Biol. 232, 987 - 988.

   55. Rama Rao AV, Ashok Reddy K, Srinivas NR, Gurjar MK, Padmaja N, Ramakumar S,
         Viswamitra MA, Swapna GVT, Jagannath B, Kunwar AC. 1993 .
         Chiral polyhydroxylated Tetrahydrothiophene Derivatives: Novel Synthesis and Structural
         Elucidation by X - ray crystallography, NMR Spectroscopy and Molecular Mechanics
         Calculations.

         J. Chem.Soc.Perkin Trans 1, 1255 - 1259.

   56. Rajashankar KR, Ramakumar S, Chauhan VS. 1992.
         Design of a helical motif using &alpha, &beta - dehydrophenylalanine residue: Crystal structure of
         Boc - Val - ΔPhe - Phe - Ala - Phe - ΔPhe &345 Val - ΔPhe - Gly - OMe, a 310 - helical
         nonapeptide.

         J. Am. Chem. Soc. 114, 9225 - 9226.

   57. Mande SS, Lalitha HN, Ramakumar S, Viswamitra MA 1992.
         Influence of acetyl and bromine substitutions on stacking. Crystal and Molecular structures
         of 8 - Bromo 2'. 3', 5' triacetyl adenosine and 8 - bromo 2', 3', 5' - triacetyl guanosine.

         Nucleosides and Nucleotides. 11, 1089 - 1101.

   58. Padmaja N, Ramakumar S, Viswamitra MA 1991.
         Crystal structure of 2' - 0 succinyl adenosine 3',5' - (Cyclic) phosphate monohydrate:
         A model compound to study protein nucleic acid interactions.

         Bull. Chem. Soc. Jpn. 64, 1359 - 1363.

   59. Padmaja N, Ramakumar S, Viswamitra MA 1991.
         Structure of 5 - methylcytidine.
         Acta Cryst. C47, 1445 - 1448.

   60. Neela BS, Manjula MV, Ramakumar S,Viswamitra MA. 1990.
         Conformation of cyclolinopeptide A, grown from DMF/ Isopropanol mixtures.
         Acta Cryst. A46, MS.04.01.09, C138 - 139.

   61. Padmaja N, Ramakumar S. 1990.
         Space group frequencies of proteins and chiral small molecules.
         Acta Cryst. A46, PS.15.02.06, C455.

   62. Padmaja N, Ramakumar S, Viswamitra MA, Krishna Kumar R, Krishna Pillay M. 1990.
         Crystal and molecular structures of two piperdine derivatives.
         Acta Cryst. A46, PS.05.04.04, C - 188.

   63. Neela BS, Manjula MV, Ramakumar S, Balasubramanian D, Viswamitra MA. 1990.
         Conformation of cyclolinopeptide Dihydrate: An antamanide analogue.
         Biopolymers. 29, 1499 - 1501.

   64. Padmaja N,Ramakumar S,Viswamitra MA. 1990.
         Space group frequencies of proteins and of organic compounds with more than one formula
         unit in the asymmetric unit.

         Acta Cryst. A46, 725 - 730.

   65. Mehta G, Prabhakar C, Padmaja N, Ramakumar S, Viswamitra MA 1989.
         From cages to wedges and clefts: Design of some novel hosts based on cis Syn,
         cis?triquinane framework.

         Tetrahedron Letters, 30, 6895 - 6898.

   66. Swaminathan K, Sinha UC, Ramakumar S, Bhatt RK Sabata BK. 1989.
         Structure of Columbin, a diterpenoid furanolactone from Tinospora Cordifolia Miers.
         Acta Cryst. C45, 300 - 303.

  67. Chandrasekhar S, Ravindranath M, Neela BS, Ramakumar S, Viswamitra MA. 1989.
         Cycloaddition of C, N Diphenylnitrone with 6,6-diphenyl-fulvene Concerted or Stepwise:
         X ray crystalstructure of the product.

         J. Chem. Research (S), 252 - 253.

  68. Lalitha HN, Ramakumar S, Viswamitra MA. 1989.
         3-D structure of 5-methyl-2'-deoxycytidine monophosphate.
         Acta Cryst. C45, 1652-1655.

  69. Sameena Begum A, Jain VK, Ramakumar S, Khetrapal CL. 1988.
         The structure of ammonium oxalohydroxamate a mono propellant.
         Acta Cryst. C44, 2176 - 2178.

  70. Sameena Begum A, Jain VK, Ramakumar S, Khetrapal CL. 1988.
         Structure of 1,2,4 oxadiazolidine 3,5-dione monohydrate.
         Acta Cryst.C44, 195 - 196.

  71. Sameena Begum A, Jain VK, Ramakumar S, Khetrapal CL. 1988.
         A plausible mechanism of thermal decomposition of oxalohydroxamic acid and
         the formation of novel products.

         Journal of Solid State Chemistry. 75, 432 - 434.

  72. Padmaja N, Ramakumar S, Viswamitra MA. 1988.
        Structure of puromycin aminonucleoside.
        Acta Cryst. C44, 2176 - 2178.

  73. Padmaja N, Ramakumar S, Viswamitra MA. 1987.
        Reinvestigation of the structure of 2-hydroxyquinoxaline.
        Acta Cryst. C43, 2239 - 2240.

  74. Padmaja N, Ramakumar S, Viswamitra MA. 1987.
         Structure of 5-methylcytosine hydrochloride.
         Acta Cryst.C43, 2157 - 2160.

  75. Sekhar JA, Rajasekharan T, RamaRao P, Parthasarathy G, Ramakumar S, Gopal ESR,
        Lakshmi CS, Mallya RM. 1986.

        Electron and X-ray diffraction studies on Al86, Fe14, Al82, Fe18 and Al75, Fe25.
        quasicrystals. Pramana J. Phys. 27, 267 - 273.

  76. Ramakumar S, Venkatesan K, Tandon JS, Dhar MM. 1985.
        Molecular and Crystal structure of coleonol, C22H34O7.
        Zeitschrift fur Kristallographie 173, 81 - 86.

  77. Suguna K, Ramakumar S, Nagaraj R Balaram P. 1985.
        Structure of Cyclo (α--Amino isobutyryl-L-phenyl alanyl) C13H16N2O2.
        Acta Crystallographica C41, 284 - 286.

  78. Suguna K, Ramakumar S, Kopple KD. 1984.
        Structure of cyclo (L-Leucyl-L-Tyrosyl) Monohydrate, C15H20N2O33H2O.
        Acta Crystallographica C40, 2053 - 2056.

  79. Suguna K, Ramakumar S, Rajappa S. 1982.
         Structure of (6S 13b)-1,2,3,5,6,13b-hexahydro-6-isopropyl-8H-pyrrolo 1’2’: 1,2 pyrazino 3,
         4-b quinazoline 5,8-dione.

         Acta Crystallographica B38, 2304 - 2306.

   80. Suguna K, Ramakumar S, Shamala N, Venkataramaprasad BV, Balaram P. 1982.
        Crystal structure of diketopiperazines containing α -amino isobutyric acid. Cyclo (Aib-Aib)
        and Cyclo (Aib-L-Ile).

        Biopolymers 21, 1847 - 1855.

   81. Suguna K, Ramakumar S, Rajappa S. 1982.
        Structure of (4S)-2,4-Dimethyl-1, 2-Dihydropyrazino (2,1-b) quinazoline-3 (4H), 6-dione.
        Acta Cryst. B38, 1654 - 1656.

   82. Venkatesan K, Ramakumar S. 1981.
         X-ray crystallographic studies on the conformational features and packing modes of amides
         (REVIEW ARTICLE) In structural studies on molecules of biological interest.

         A volume in honour of Prof. Dorothy Hodgkin, edited by G. Dodson, J.P. Glusker and D.Sayre.
         Clarenden Press, Oxford, pages 137 - 153.

   83. Blaha K, Malon P, Tichy M, Fric I, Usha R, Ramakumar S, Venkatesan K. 1978.
        Crystal Structure and Chiroptical properties of (+)-(3S)-4-azatricyclo (4.3. 1.0 (3,7))
        decan-5-one.

        Collect. Czech. Chem. Commun. 43, 3241 - 3251.

   84. Tandon JS, Dhar MM, Ramakumar S, Venkatesan K. 1977
         Structure of a Biologically active diterpene from Coleus Forskohlii.
         Indian J. Chem. 15B, 880 - 883.

   85. Ramakumar S, Venkatesan K, Rao ST. 1977.
         The Crystal and Molecular Structure of 1-(diphenyl methyl) azetidin-3-Ol.
         Acta Cryst. B 33, 824 - 829.

   86. Ramakumar S, Venkatesan K, Weber HP. 1977
         The Crystal and Molecular Structure of 4-aza-5-oxotricyclo (4.4.0.0 (3,8))
         decane, azatwistanone.

        Helv. Chem. Acta. 60, 1691 - 1693.

   87. Marsh RE, Ramakumar S, Venkatesan K. 1976.
         The Crystal and Molecular Structure of Glycyl - DL - Phenylalanine.
        Acta Cryst. B32, 66 - 70.

   88. Ramakumar S, Venkatesan K, Shamala N. 1973.
         Determination of the Crystal and Molecular Structure of L - Serine using rotation and
         translation functions.

         Indian J. Pure and Appl. Phys. II, 461 - 463.