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Vasudev, Prema G. ; Banerjee, Mousumi ; Ramakrishnan, C. ; Balaram, P. (2012) Asparagine and glutamine differ in their propensities to form specific side chain-backbone hydrogen bonded motifs in proteins Proteins: Structure, Function, and Bioinformatics, 80 (4). pp. 991-1002. ISSN 0887-3585

Indu, S. ; Kochat, V. ; Thakurela, S. ; Ramakrishnan, C. ; Varadarajan, Raghavan (2011) Conformational analysis and design of cross-strand disulfides in antiparallel β-sheets Proteins: Structure, Function,and Bioinformatics, 79 (1). pp. 244-260. ISSN 0887-3585

Indu, S. ; Kumar, Senthil T. ; Thakurela, Sudhir ; Gupta, Mansi ; Bhaskara, Ramachandra M. ; Ramakrishnan, C. ; Varadarajan, Raghavan (2010) Disulfide conformation and design at helix N-termini Proteins: Structure, Function, and Bioinformatics, 78 (5). pp. 1228-1242. ISSN 0887-3585

Vasudev, Prema G. ; Chatterjee, Sunanda ; Ramakrishnan, Chandrasekharan ; Shamala, Narayanaswamy ; Balaram, Padmanabhan (2009) Conformational choices for the stereochemically constrained γ-amino acid residue gabapentin: theoretical studies and correlation with experimental results Peptide Science, 92 (5). pp. 426-435. ISSN 0006-3525

Chatterjee, Sunanda ; Vasudev, Prema G. ; Raghothama, Srinivasarao ; Ramakrishnan, Chandrasekharan ; Shamala, Narayanaswamy ; Balaram, Padmanabhan (2009) Expanding the peptide β-turn in αγ hybrid sequences: 12 atom hydrogen bonded helical and hairpin turns Journal of the American Chemical Society, 131 (16). pp. 5956-5965. ISSN 0002-7863

Bajaj, Kanika ; Madhusudhan, M. S. ; Adkar, Bharat V. ; Chakrabarti, Purbani ; Ramakrishnan, C. ; Sali, Andrej ; Varadarajan, Raghavan (2007) Stereochemical criteria for prediction of the effects of proline mutations on protein stability PLoS Computational Biology, 3 (12). e241-e241. ISSN 1553-734X

Prakash, Tulika ; Sandhu, Kuljeet Singh ; Singh, Nitin Kumar ; Bhasin, Yasha ; Ramakrishnan, C. ; Brahmachari, Samir K. (2007) Structural assessment of glycyl mutations in invariantly conserved motifs Proteins: Structure, Function, and Bioinformatics, 69 (3). pp. 617-632. ISSN 0887-3585

Das, Mili ; Kobayashi, Masanori ; Yamada, Yusuke ; Sreeramulu, Sridhar ; Ramakrishnan, C. ; Wakatsuki, Soichi ; Kato, Ryuichi ; Varadarajan, Raghavan (2007) Design of disulfide-linked thioredoxin dimers and multimers through analysis of crystal contacts Journal of Molecular Biology, 372 (5). pp. 1278-1292. ISSN 0022-2836

Prajapati, Ravindra Singh ; Das, Mili ; Sreeramulu, Sridhar ; Sirajuddin, Minhajuddin ; Srinivasan, Sankaranarayanan ; Krishnamurthy, Vaishnavi ; Ranjani, Ranganathan ; Ramakrishnan, C. ; Varadarajan, Raghavan (2007) Thermodynamic effects of proline introduction on protein stability Proteins: Structure, Function, and Bioinformatics, 66 (2). pp. 480-491. ISSN 0887-3585

Ramakrishnan, C. ; Lakshmi, B. ; Kurien, A. ; Devipriya, D. ; Srinivasan, N. (2007) Structural compromise of disallowed conformations in peptide and protein structures Protein and Peptide Letters, 14 (7). pp. 672-682. ISSN 0929-8665

Chakraborty, Kausik ; Thakurela, Sudhir ; Prajapati, Ravindra Singh ; Indu, S. ; Shaik Syed Ali, P. ; Ramakrishnan, C. ; Varadarajan, Raghavan (2005) Protein stabilization by introduction of cross-strand disulfides Biochemistry, 44 (44). pp. 14638-14646. ISSN 0006-2960

Prakash, Tulika ; Ramakrishnan, C. ; Dash, Debasis ; Brahmachari, Samir K. (2005) Conformational analysis of invariant peptide sequences in bacterial genomes Journal of Molecular Biology, 345 (5). pp. 937-955. ISSN 0022-2836

Nandi, Tannistha ; Dash, Debasis ; Ghai, Rohit ; Rao, Chandrika B. ; Kannan, K. ; Brahmachari, Samir K. ; Ramakrishnan, C. ; Ramachandran, Srinivasan (2003) A novel complexity measure for comparative analysis of protein sequences from complete genomes Journal of Biomolecular Structure & Dynamics, 205 (5). pp. 657-668. ISSN 0739-1102

Ghosh, Pallavi ; Ramakrishnan, Chandrasekharan ; Chatterji, Dipankar (2003) Inter-subunit recognition and manifestation of segmental mobility in Escherichia coli RNA polymerase: a case study with ω-β' interaction Biophysical Chemistry, 103 (3). pp. 223-237. ISSN 0301-4622

Dani, Vardhan S. ; Ramakrishnan, C. ; Varadarajan, Raghavan (2003) MODIP revisited: re-evaluation and refinement of an automated procedure for modeling of disulfide bonds in proteins Protein Engineering, 16 (3). pp. 187-193. ISSN 0269-2139

Eswar, Narayanan ; Ramakrishnan, C. ; Srinivasan, N. (2003) Stranded in isolation: structural role of isolated extended strands in proteins Protein Engineering, 16 (5). pp. 331-339. ISSN 0269-2139

Eswar, Narayanan ; Nagarajaram, H. A. ; Ramakrishnan, C. ; Srinivasan, N. (2002) Influence of solvent molecules on the stereochemical code of glycyl residues in proteins Proteins: Structure, Function, and Bioinformatics, 49 (3). pp. 326-334. ISSN 0887-3585

Ramasarma, T. ; Ramakrishnan, C. (2002) On the importance of backbone loop and peptide flip in the Walker sequence in F₁-ATPase action Indian Journal of Biochemistry & Biophysics, 39 (1). pp. 5-15. ISSN 0301-1208

Ramakrishnan, C. ; Dani, V. S. ; Ramasarma, T. (2002) A conformational analysis of walker motif A [GXXXXGKT (S)] in nucleotide-binding and other proteins Protein Engineering, 15 (10). pp. 783-798. ISSN 0269-2139

Ramakrishnan, C. (2001) Ramachandran and his Map Resonance- Journal of Science Education, 6 (10). pp. 48-56. ISSN 0971-8044

Eswar, Narayanan ; Ramakrishnan, C. (2000) Deterministic features of side-chain main-chain hydrogen bonds in globular protein structures Protein Engineering, 13 (4). pp. 227-238. ISSN 0269-2139

Ganesh, C. ; Eswar, Narayanan ; Srivastava, Sarika ; Ramakrishnan, Chandrasekharan ; Varadarajan, Raghavan (1999) Prediction of the maximal stability temperature of monomeric globular proteins solely from amino acid sequence FEBS Letters, 454 (1). pp. 31-36. ISSN 0014-5793

Iengar, Prathima ; Ramakrishnan, C. (1999) Knowledge-based modeling of the serine protease triad into non-proteases Protein Engineering Design and Selection, 12 (8). pp. 649-656. ISSN 1741-0126

Eswar, Narayanan ; Ramakrishnan, C. (1999) Secondary structures without backbone: an analysis of backbone mimicry by polar side chains in protein structures Protein Engineering, 12 (6). pp. 447-455. ISSN 0269-2139

Gunasekaran, K. ; Gomathi, L. ; Ramakrishnan, C. ; Chandrasekhar, J. ; Balaram, P. (1998) Conformational interconversions in peptide β-turns: analysis of turns in proteins and computational estimates of barriers Journal of Molecular Biology, 284 (5). pp. 1505-1516. ISSN 0022-2836

Ramakrishnan, C. ; Nataraj, D. V. (1998) Energy minimization studies on α-turns Journal of Peptide Science, 4 (4). pp. 239-252. ISSN 1075-2617

Gunasekaran, K. ; Nagarajaram, H. A. ; Ramakrishnan, C. ; Balaram, P. (1998) Stereochemical punctuation marks in protein structures: glycine and proline containing helix stop signals Journal of Molecular Biology, 275 (5). pp. 917-932. ISSN 0022-2836

Gunasekaran, K. ; Ramakrishnan, C. ; Balaram, P. (1997) Beta-hairpins in proteins revisited: lessons for de novo design Protein Engineering Design & Selection, 10 (10). pp. 1131-1141. ISSN 1741-0126

Varadarajan, R. ; Nagarajaram, H. A. ; Ramakrishnan, C. (1996) A procedure for the prediction of temperature-sensitive mutants of a globular protein based solely on the amino acid sequence PNAS, 93 (24). pp. 13908-13913. ISSN 0027-8424

Varadarajan, R. ; Nagarajaram, H. A. ; Ramakrishnan, C. (1996) A procedure for the prediction of temperature-sensitive mutants of a globular protein based solely on the amino acid sequence Proceedings of the National Academy of Sciences of the United States of America, 93 (24). pp. 13908-13913. ISSN 0027-8424

Gunasekarana, K. ; Ramakrishnan, C. ; Balaram, P. (1996) Disallowed Ramachandran conformations of amino acid residues in protein structures Journal of Molecular Biology, 264 (1). pp. 191-198. ISSN 0022-2836

Ramakrishnan, C. ; Srinivasan, N. ; Nataraj, D. V. (1996) Motifs and conformational analysis of amino acid residues adjoining β-turns in proteins International Journal of Peptide and Protein Research, 48 (5). pp. 420-428. ISSN 0367-8377

Nagarajaram, H. A. ; Ramakrishnan, C. (1995) Stereochemical studies on cyclic peptides: detailed energy minimization studies on hydrogen bonded all-trans cyclic pentapeptide backbones Journal of Biosciences, 20 (5). pp. 591-611. ISSN 0250-5991

Gunasekaran, K. ; Ramakrishnan, C. ; Balaram, P. (1995) Stereochemical analysis of the antigenic tip of the V3 loop peptide of HIV-1 gp120 International Journal of Peptide and Protein Research, 46 (5). pp. 359-363. ISSN 0367-8377

Nataraj, D. V. ; Srinivasan, N. ; Sowdhamini, R. ; Ramakrishnan, C. (1995) α-Turns in protein structure Current Science, 69 (5). pp. 434-447. ISSN 0011-3891

Srinivasan, N. ; Anuradha, V. S. ; Ramakrishnan, C. ; Sowdhamini, R. ; Balaram, P. (1993) Conformational characteristics of asparaginyl residues in proteins International Journal of Peptide and Protein Research, 44 (2). pp. 112-122. ISSN 0367-8377

Nagarajaram, H. A. ; Sowdhamini, R. ; Ramakrishnan, C. ; Balaram, P. (1993) Termination of right handed helices in proteins by residues in left handed helical conformations FEBS Letters, 321 (1). pp. 79-83. ISSN 0014-5793

Ramakrishnan, C. ; Srinivasan, N. (1993) Conformational preference of glycyl residues in proteins. A further confirmaiton Proceedings of the Indian National Science Academy - Part B: Biological Sciences, 59 (1). pp. 45-54. ISSN 0073-6600

Sowdhamini, R. ; Ramakrishnan, C. ; Balaram, P. (1993) Modelling multiple disulphide loop containing polypeptides by random conformation generation. The test cases of α-conotoxin GI and edothelin I Protein Engineering Design & Selection, 6 (8). pp. 873-882. ISSN 1741-0126

Nagarajaram, H. A. ; Paul, P. K. C. ; Ramanarayanan, K. ; Soman, K. V. ; Ramakrishnan, C. (1992) Conformational studies on β-bend containing a cis peptide unit International Journal of Peptide and Protein Research, 40 (5). pp. 383-394. ISSN 0367-8377

Sowdhamini, R. ; Srinivasan, N. ; Ramakrishnan, C. ; Balaram, P. (1992) Orthogonal ββ motifs in proteins Journal of Molecular Biology, 223 (4). pp. 845-851. ISSN 0022-2836

Nagarajaram, H. A. ; Ramakrishnan, C. (1991) Energy minimization studies on cyclic pentapeptide Indian Journal of Physics, 65B . 449 -454. ISSN 0019-5480

Ramakrishnan, C. ; Srinivasan, N. (1990) Glycyl residues in proteins and peptides: an analysis Current Science, 59 (17-18). pp. 851-862. ISSN 0011-3891

Ramakrishnan, C. ; Geetha, Y. S. (1990) Analysis of the coordination geometry in copper complexes Proceedings of the Indian Academy of Sciences - Chemical Sciences, 102 (4). pp. 481-496. ISSN 0253-4134

Srinivasan, N. ; Sowdhamini, R. ; Ramakrishnan, C. ; Balaram, P. (1990) Conformations of disulfide bridges in proteins International Journal of Peptide and Protein Research, 36 (2). pp. 147-155. ISSN 0367-8377

Raghothama, S. ; Ramakrishnan, C. ; Balasubramanian, D. ; Balaram, P. (1989) Conformational analysis of cyclolinopeptide A, a cyclic nonapeptide: nuclear overhauser effect and energy minimization studies Biopolymers, 28 (2). pp. 573-588. ISSN 0006-3525

Sowdhamini, R. ; Srinivasan, N. ; Shoichet, Brian ; Santi, Daniel V. ; Ramakrishnan, C. ; Balaram, P. (1989) Stereochemical modeling of disulfide bridges. Criteria for introduction into proteins by site-directed mutagenesis Protein Engineering Design & Selection, 3 (2). pp. 95-103. ISSN 1741-0126

Ramakrishnan, Chandrashekharan ; Sowdhamini, Ramanathan ; Balaram, Padmanabhan (1988) Analysis of short interproton distances in proline peptides as a guide in the interpretation of nuclear overhauser effects Collection of Czechoslovak Chemical Communications, 53 (11). pp. 2801-2809. ISSN 0010-0765

Ramakrishnan, C. ; Sukumar, M. ; Balaram, P. (1987) Nuclear overhauser effects as probes of peptide structure. A diagnostic for left-handed helical conformations Biochemical and Biophysical Research Communications, 149 (3). pp. 953-959. ISSN 0006-291X

Ananthanarayanan, V. S. ; Soman, K. V. ; Ramakrishnan, C. (1987) A novel supersecondary structure in globular proteins comprising the collagen-like helix and β-turn Journal of Molecular Biology, 198 (4). pp. 705-709. ISSN 0022-2836

Ramnarayan, K. ; Ramakrishnan, C. (1987) Standard dimensions for cis N-methyl peptide unit and flexibility of cis peptide units Journal of Biosciences, 12 (4). pp. 331-347. ISSN 0250-5991

Ramakrishnan, C. ; Ramnarayan, K. ; Manjula, G. (1987) Stereochemical studies of cyclic peptides. XIV. Conformational analysis of cyclic tripeptides International Journal of Peptide and Protein Research, 29 (6). pp. 657-671. ISSN 0367-8377

Ramakrishnan, C. ; Srinivasan, N. ; Prashanth, D. (1987) Conformation of glycyl residues in globular proteins International Journal of Peptide and Protein Research, 29 (5). pp. 629-637. ISSN 0367-8377

Paul, P. K. C. ; Ramakrishnan, C. (1987) Stereochemical studies on cyclic peptides. XIII. Energy minimization studies on cyclic hexapeptides having hydrogen bonds International Journal of Peptide and Protein Research, 29 (4). pp. 433-454. ISSN 0367-8377

Soman, K. V. ; Ramakrishnan, C. (1986) Identification and analysis of extended strands and β-sheets in globular proteins International Journal of Biological Macromolecules, 8 (2). pp. 89-96. ISSN 0141-8130

Ramakrishnan, C. ; Paul, P. K. C. ; Ramnarayan, K. (1985) Cyclic peptides- small and big and their conformational aspects Journal of Biosciences, 8 (1&2). pp. 239-251. ISSN 0250-5991

Soman, K. V. ; Ramakrishnan, C. (1985) Solvent accessibility studies of β-bends and application to cyclic hexapeptides Biopolymers, 24 (7). pp. 1205-1214. ISSN 0006-3525

Paul, P. K. ; Ramakrishnan, C. (1985) Studies on hydrogen bonds. Part V- Hydrogen bonding in energy minimization studies of peptides Journal of Biomolecular Structure & Dynamics, 2 (5). pp. 879-898. ISSN 0739-1102

Soman, K. V. ; Ramakrishnan, C. (1983) Occurence of a single helix of the collagen type in globular proteins Journal of Molecular Biology, 170 (4). pp. 1045-1048. ISSN 0022-2836

Ramakrishna, C. ; Soman, K. V. (1982) Identification of secondary structures in globular proteins- a new algorithm International Journal of Peptide and Protein Research, 20 (3). pp. 218-237. ISSN 0367-8377

Mitra, Jayati ; Ramakrishnan, C. (1981) Studies on hydrogen bonds: Part IV. Proposed working criteria for assessing qualitative strength of hydrogen bonds International Journal of Peptide and Protein Research, 17 (4). pp. 401-411. ISSN 0367-8377

Ramakrishnan, C. ; Narasinga Rao, B. N. (1980) Stereochemical studies on cyclic peptides International Journal of Peptide and Protein Research, 15 (2). pp. 81-95. ISSN 0367-8377

Rao, B. N. Narasinga ; Ramakrishnan, C. ; Balaram, P. (1979) Metal binding to pyridoxal derivatives. An NMR study of the interaction of Eu(III) with pyridoxal phosphate and pyridoxamine phosphate Journal of Biosciences, 1 (1). pp. 35-47. ISSN 0250-5991

Manjula, G. ; Ramakrishnan, C. (1979) Stereochemical studies on cyclic peptides. IX. Conformational studies on cyclic tetrapeptides containing alternating cis and trans peptide units Biopolymers, 18 (3). pp. 591-607. ISSN 0006-3525

Manjula, G. ; Ramakrishnan, C. (1979) Stereochemical studies on cyclic peptides. Part X. Conformational Analysis of Hydrogen Bonded Cyclic Pentapeptides International Journal of Peptide and Protein Research, 13 (3). pp. 353-362. ISSN 0367-8377

Ramakrishnan, C. ; Mitra, Jayati (1978) The dimensions of the ester unit Proceedings of the Indian Academy Of Science, Section A, 87 (1). pp. 13-21. ISSN 0370-0089

Manjula, G. ; Ramakrishnan, C. ; Sarathy, K. P. (1977) Stereochemical studies on cyclic peptides. VIII. Conformational analysis of hydrogen bonded cyclohexaglycyl molecule with a centre of inversion symmetry Proceedings of the Indian Academy of Sciences, Section A, 86 (5). pp. 443-454. ISSN 0370-0089

Mitra, Jayati ; Ramakrishnan, C. (1977) Analysis of O-H...O hydrogen bonds International Journal of Peptide and Protein Research, 9 (1). pp. 27-48. ISSN 0367-8377

Bansal, M. ; Ramakrishnan, C. ; Ramachandran, G. N. (1975) A triple-helical model for (Gly-Pro-Hyp)_n with cis peptide units Biopolymers, 14 (12). pp. 2457-2466. ISSN 0006-3525

Bansal, M. ; Ramakrishnan, C. ; Ramachandran, G. N. (1975) Stabilization of the collagen structure by hydroxyproline residues Proceedings of the Indian Academy of Sciences, Section A, 82 (4). pp. 152-164. ISSN 0370-0089

Ramachandran, G. N. ; Bansal, M. ; Ramakrishnan, C. (1975) Hydroxyproline stabilizes both intrafibrillar structure as well as inter-protofibrillar linkages in collagen Current Science, 44 (1). pp. 1-3. ISSN 0011-3891

Ramachandran, G. N. ; Kolaskar, A. S. ; Ramakrishnan, C. ; Sasisekharan, V. (1974) The mean geometry of the peptide unit from crystal structure data Biochimica et Biophysica Acta (BBA) - Protein Structure, 359 (2). pp. 298-302. ISSN 0005-2795

Balasubramanian, R. ; Ramakrishnan, C. (1972) Refinement of the function for the evaluation of the N-H···O hydrogen bond potential energy Proceedings of the Indian Academy of Sciences, Section A, 76 (1). pp. 21-26. ISSN 0370-0089

Ramakrishnan, C. ; Balasubramanian, R. (1972) Stereochemical criteria for polypeptide and protein chain conformations. VII. Effect of non-planarity and bond angle distortion at the α-carbon atom on the contact map for a pair of peptide units International Journal of Peptide and Protein Research, 4 (2). pp. 79-90. ISSN 0367-8377

Balasubramanian, R. ; Ramakrishnan, C. (1972) Stereochemical criteria for polypeptide and protein chain conformations. VIII. Energy maps for a pair of non-planar peptide units having distortion of bond angle at the α-carbon atom International Journal of Peptide and Protein Research, 4 (2). pp. 91-99. ISSN 0367-8377

Ramakrishnan, C. ; Prasad, Nageshwar (1972) Rigid-body refinement and conformation of α-chitin Biochimica et Biophysica Acta (BBA) - General Subjects, 261 (1). pp. 123-135. ISSN 0304-4165

Sarathy, K. P. ; Ramakrishnan, C. (1972) Stereochemical studies on cyclic peptides. VII. Effect of different types of energies on the hydrogen-bonded conformations of cyclic hexapeptides International Journal of Peptide and Protein Research, 4 (1). pp. 1-9. ISSN 0367-8377

Prasad, Nageshwar ; Ramakrishnan, C. (1972) Studies on the structure and conformation of chitins. Part I. Mathematics of rigid body refinement procedure as applied to the structure of alpha-chitin Indian Journal of Pure & Applied Physics, 10 . pp. 501-550. ISSN 0019-5596

Ramakrishnan, C. ; Prasad, Nageshwar (1971) Study of hydrogen bonds in amino acids and peptides International Journal of Protein Research, 3 (1-4). pp. 209-231. ISSN 0020-7551

Ramakrishnan, C. ; Sarathy, K. P. (1969) Stereochemical studies on cyclic peptides. IV. Conformational analysis of cyclopentapeptides International Journal of Protein Research, 1 (1-4). pp. 63-71. ISSN 0020-7551

Ramakrishnan, C. ; Sarathy, K. P. (1969) Stereochemical studies on cyclic peptides. V. Conformational analysis of cyclohexapeptides International Journal of Protein Research, 1 (1-4). pp. 103-111. ISSN 0020-7551

Ramakrishnan, C. ; Sarathy, K. P. (1968) Stereochemical studies on cyclic peptides: III. Conformational analysis of cyclotetrapeptides Biochimica et Biophysica Acta (BBA) - Protein Structure, 168 (3). pp. 402-410. ISSN 0005-2795

Ramachandran, G. N. ; Sasisekharan, V. ; Ramakrishnan, C. (1966) Molecular structure of polyglycine II Biochimica et Biophysica Acta (BBA) - Biophysics including Photosynthesis, 112 (1). pp. 168-170. ISSN 0926-6585

Ramakrishnan, C. ; Ramachandran, G. N. (1965) Stereochemical criteria for polypeptide and protein chain conformations. II. Allowed conformations for a pair of peptide units Biophysical Journal, 5 (6). pp. 909-933. ISSN 0006-3495

Ramachandran, G. N. ; Ramakrishnan, C. ; Venkatachalam, C. M. (1965) Determination of the possible conformations of the residues linked in a polypeptide chain Biopolymers, 3 (5). pp. 591-592. ISSN 0006-3525

Ramakrishnan, C. (1964) Stereochemical criteria for polypeptide and protein chain conformations. Part I. Evaluation of helical parameters Proceedings of the Indian Academy of Sciences, Section A, 59 (5). pp. 327-343. ISSN 0370-0089

Ramachandran, G. N. ; Ramakrishnan, C. ; Sasisekharan, V. (1963) Stereochemistry of polypeptide chain configurations Journal of Molecular Biology, 7 (1). pp. 95-99. ISSN 0022-2836

Ramachandran, G. N. ; Ramakrishnan, C. (1962) The structure of chitin Biochimica et Biophysica Acta, 63 (2). pp. 307-309. ISSN 0006-3002