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Rai, Rajkishor and Vasudev, Prema G and Ananda, Kuppanna and Raghothama, Srinivasarao and Shamala, Narayanaswamy and Karle, Isabella L and Balaram, Padmanabhan (2007) Hybrid Peptides: Expanding the \beta Turn in Peptide Hairpins by the Insertion of \beta-, \gamma-, and \delta-Residues. In: Chemistry - A European Journal, 13 (20). pp. 5917-5926.
Rituparna, S Roy and Hosahudya, N Gopi and Raghothama, Srinivasarao and Karle, Isabella L and Balaram, Padmanabhan (2006) Hybrid peptide hairpins containing alpha- and omega-amino acids: Conformational analysis of decapeptides with unsubstituted beta-, gamma-, and delta-residues at positions 3 and 8. In: Chemistry - A European Journal, 12 (12). pp. 3295-3302.
Roy, Rituparna S and Gopi, Hosahudya N and Raghothama, Srinivasa Rao and Karle, Isabella L and Balaram, Padmanabhan (2006) Hybrid Peptide Hairpins Containing $\alpha$-and $\varpi$-Amino Acids: Conformational Analysis of Decapeptides with Unsubstituted $\beta$-, $\gamma$-, and $\delta$-Residues at Positions 3 and 8. In: Chemistry - A European Journal, 12 (12). 3295 -3302.
Roy, Rituparna S and Gopi, Hosahudya N and Raghothama, S and Gilardi, Richard D and Karle, Isabella L and Balaram, Padmanabhan (2005) Peptide Hairpins with Strand Segments Containing \alpha - and \beta - Amino Acid Residues: Cross- Strand Aromatic Interactions of Facing Phe Residues. In: Peptide Science, 80 (6). pp. 787-799.
Roy, Rituparna S and Karle, Isabella L and Raghothama, S and Balaram, P (2004) $\alpha,\beta$hybrid peptides:a polypeptide helix with a central segment containing two consecutive $\beta$-amino acid residues. In: Proceedings of the National Academy of Sciences, 101 (47). pp. 16478-16482.
Gudihal, Ravindra and Rappal, Ranganayaki S and Raghothama, Srinivasa and Mandayam, Srinivasan C and Gilardi, Richard D and Karle, Isabella L and Balaram, Padmanabhan (2004) Two Novel Hexadepsipeptides with Several Modified Amino Acid Residues Isolated from the Fungus Isaria. In: Chemistry & Biodiversity, 1 (3). pp. 489-504.
Karle, Isabella L and Gopi, Hosahudya N and Balaram, Padmanabhan (2003) Crystal structure of a hydrophobic 19-residue peptide helix containing three centrally located D amino acids. In: Proceedings of the National Academy of Sciences of the United States of America, 100 (24). pp. 13946-13951.
Aravinda, Subrayashastry and Shamala, Narayanaswamy and Das, Chittaranjan and Sriranjini, Arumugam and Karle, Isabella L and Balaram, Padmanabhan (2003) Aromatic-Aromatic Interactions in Crystal Structures of Helical Peptide Scaffolds Containing Projecting Phenylalanine Residues. In: Journal of the American Chemical Society, 125 (18). pp. 5308-5315.
Hosahudya, Gopi N and Roy, Rituparna S and Raghothama, Srinivasa R and Karle, Isabella L (2002) Beta-Hairpins Generated from Hybrid Peptide Sequences Containing both Alpha- and Beta-Amino Acids. In: Helvetica Chimica Acta, 85 (10). pp. 3313-3330.
Karle, Isabella L and Das, Chittaranjan and Balaram, P (2001) Effects of Hydrogen-Bond Deletion on Peptide Helices: Structural Characterization of Depsipeptides Containing Lactic Acid. In: Biopolymers, 59 (4). pp. 276-289.
Das, Chittaranjan and Naganagowda, GA and Karle, Isabella L and Balaram, P (2001) Designed beta-Hairpin Peptides with Defined Tight Turn Stereochemistry. In: Biopolymers, 58 (3). pp. 335-346.
Karle, Isabella L and Gopi, Hosahudya N and Balaram, Padmanabhan (2001) Peptide hybrids containing alpha- and beta-amino acids: Structure of a decapeptide beta-hairpin with two facing beta-phenylalanine residues. In: Proceedings of the National Academy of Sciences of the United States of America, 98 (7). pp. 3716-3719.
Karle, Isabella L and Das, Chittaranjan and Balaram, Padmanabhan (2000) De novo protein design: Crystallographic characterization of a synthetic peptide containing independent helical and hairpin domains. In: Proceedings of the National Academy of Sciences of the United States of America, 97 (7). pp. 3034-3037.
Karle, Isabella L and Perozzo, Mary Ann and Mishra, Vinod K and Balaram, Padmanabhan (1998) Crystal structure of the channel-forming polypeptide antiamoebin in a membrane-mimetic environment. In: Proceedings of the National Academy of Sciences of the United States of America (PNAS), 95 (10). pp. 5501-5504.
Karle, Isabella L and Ramesh, Kaul and Balaji, Rao R and Raghothama, Srinivasarao and Balaram, P (1997) Stereochemical Analysis of Higher α,α-Dialkylglycine Containing Peptides. Characterization of Local Helical Conformations at Dipropylglycine Residues and Observation of a Novel Hydrated Multiple β-Turn Structure in Crystals of a Glycine Rich Peptide. In: Journal of American Chemical Society, 119 (50). pp. 12048-12054.
Karle, Isabella L and Banerjee, Arindam and Balaram, Padmanabhan (1997) Design of two-helix motifs in peptides: crystal structure of a system of linked helices of opposite chirality and a model helix-linker peptide. In: Folding and Design, 2 (4). pp. 203-210.
Banerjee, Arindam and Raghothama, Srinivasa Rao and Karle, Isabella L and Balaram, Padmanabhan (1996) Ambidextrous Molecules: Cylindrical Peptide Structures Formed by Fusing Left- and Right-Handed Helices. In: Biopolymers, 39 (3). pp. 279-285.
Karle, Isabella L and Awasthi, Satish Kumar and Balaram, Padmanabhan (1996) A designed beta-hairpin peptide in crystals. In: Proceedings of the National Academy of Sciences of the United States of America, 93 (16). pp. 8189-8193.
Karle, Isabella L and Rao, Balaji R and Kaul, Ramesh and Prasad, Sudhanand and Balaram, P (1996) Peptide Design: Crystal Structure of a Helical Peptide Module Attached to a Potentially Nonhelical Amino Terminal Segment. In: Biopolymers, 39 (1). pp. 75-83.
Karle, Isabella L and Banerjee, Arindam and Bhattacharjya, Surajit and Balaram, P (1996) Solid State and Solution Conformations of a Helical Peptide with a Central Gly-Gly Segment. In: Biopolymers, 38 (4). pp. 515-526.
Karle, Isabella L and Gurunath, R and Prasad, Sudhanand and Kaul, Ramesh and Rao, Balaji R and Balaram, P (1995) Peptide Design. Structural Evaluation of Potential Nonhelical Segments Attached to Helical Modules. In: Journal of the American Chemical Society, 117 (38). pp. 9632-9637.
Karle, Isabella L and Rao, Balaji R and Prasad, Sudhanand and Kaul, Ramesh and Balaram, P (1994) Nonstandard Amino Acids in Conformational Design of Peptides. Helical Structures in Crystals of 5-10 Residue Peptides Containing Dipropylglycine and Dibutylglycine. In: Journal of the American Chemical Society, 116 (23). pp. 10355-10361.
Karle, Isabella L and Flippen-Anderson, Judith L and Gurunath, R and Balaram, P (1994) Facile transition between 310- and alpha-helix: Structures of 8-, 9-, and 10-residue peptides containing the -(Leu-Aib-Ala)2-Phe-Aib- fragment. In: Protein Science, 3 (9). pp. 1547-1555.
Karle, Isabella L and Flippen-Anderson, Judith L and Agarwalla, S and Balaram, P (1994) Conformation of the flexible bent helix of Leu1-zervamicin in crystal C and a possible gating action for ion passage. In: Biopolymers, 34 (6). pp. 721-735.
Karle, Isabella L and Flippen-Anderson, Judith L and Uma, K and Balaram, P (1993) Unfolding of an alpha-Helix in Peptide Crystals by Solvation: Conformational Fragility in a Heptapeptide. In: Biopolymers, 33 (5). pp. 827-837.
Karle, Isabella L and Flippen-Anderson, Judith L and Sukumar, Muppalla and Balaram, Padmanabhan (1992) Differences in hydration and association of helical Boc-Val-Ala-Leu-Aib-Val-Ala-Leu-(Val-Ala-Leu-Aib)2-OMe. xH2O in two crystalline polymorphs. In: Journal of Medical Chemistry, 35 (21). pp. 3885-3889.
Karle, Isabella L and Flippen-Anderson, Judith L and Sukumar, M and Balaram, P (1992) Helix Packing of Leucine-Rich Peptides: A Parallel Leucine Ladder in the Structure of Boc- Aib-Leu- Aib- Aib-Leu-Leu-Leu- Aib-Leu- Aib-OMe. In: Proteins: Structure, Function, and Genetics, 12 (4). pp. 324-330.
Karle, Isabella L and Flippen-Anderson, Judith L and Agarwalla, Sanjay and Balaram, Padmanabhan (1991) Crystal structure of [Leu1]zervamicin, a membran ion-channel peptide: Implications for gating mechanisms. In: Proceedings of the National Academy of Sciences of the United States of America, 88 (12). pp. 5307-5311.
Karle, Isabella L and Flippen-Anderson, Judith L and Uma, K and Balaram, P (1990) Helix Aggregation in Peptide Crystals: Occurrence of Either All Parallel or Antiparallel Packing Motifs for \alpha-Helices in Polymorphs of Boc-Aib-Ala-leu-Ala-leu-Aib-leu-Ala-leu-Aib-OMe. In: Biopolymers, 29 (14). pp. 1835-1845.
Karle, Isabella L and Flippen-Anderson, Judith L and Uma, Kuchibhotla and Balaram, Padmanabhan (1990) Parallel zippers formed by \alpha-helical peptide columns in crystals of Boc-Aib-Glu(OBzl)-Leu-Aib-Ala-Leu-Aib-Ala-Lys(Z)-Aib-OMe. In: Proceedings of the National Academy of Sciences of the United States of America, 87 (20). pp. 7921-7925.
Karle, Isabella L and Flippen-Anderson, JL and Uma, K and Balaram, Padmanabhan (1990) Helix construction using a-aminoisobutyryl residues in a modular approach to synthetic protein design. Conformational properties of an apolar decapeptide in two different crystal forms and in solution. In: Current Science (Bangalore), 59 (17). 875-885 .
Karle, Isabella L and Flippen-Anderson, Judith L and Uma, K and Balaram, Hemalatha and Balaram, P (1990) Peptide Design: Influence of a Guest Aib-Pro Segment on the Stereochemistry of an Oligo-Val Sequence-Solution Conformations and Crystal Structure of Boc-(Val)2-Aib-Pro-(Val)3-OMe. In: Biopolymers, 29 (10-11). pp. 1433-1442.
Karle, Isabella L and Flippen-Anderson, Judith L and Uma, K and Balaram, P (1990) Apolar Peptide Models for Conformational Heterogeneity, Hydration, and Packing of Polypeptide Helices: Crystal Structure of Hepta- and Octapeptides Containing \alpha-Aminoisobutyric Acid. In: Proteins: Structure, Function, and Genetics, 7 (1). pp. 62-73.
Karle, Isabella L and Flippen-Anderson, Judith L and Uma, K and Balaram, P (1990) Synthetic Peptide Helices in Crystals: Structure and Antiparallel and Skewed Packing Motifs for \alpha-Helices in Two Isomeric Decapeptides. In: Biopolymers, 30 (7-8). pp. 719-731.
Karle, Isabella L and Flippen-Anderson, Judith L and Uma, K and Balaram, P (1989) Modular Design of Synthetic Protein Mimics. Characterization of the Helical Conformation of a 13-Residue Peptide in Crystals. In: Biochemistry, 28 (16). pp. 6696-6701.
Karle, Isabella L and Flippen-Anderson, Judith L and Uma, Kuchibhotla and Balaram, Hemalatha and Balaram, Padmanabhan (1989) \alpha -Helix and Mixed $3_{10}$/ \alpha -helix in Cocrystallized Conformers of Boc-Aib-Val-Aib-Aib-Val-Val-Val-Aib-Val-Aib-Ome. In: Proceedings of the National Academy of Sciences of the United States of America, 86 (3). pp. 765-769.
Karle, Isabella L and Flippen-Anderson, Judith L and Sukumar, Mupalla and Balaram, Padmanabhan (1988) Monoclinic polymorph of Boc-Trp-Ile-Ala-Aib-Ile-Val-Aib-Leu-Aib-Pro-OMe(anhydrous). Parallel packing of 3(10)-/alpha-helices and a transition of helix type. In: International Journal of Peptide & Protein Research, 31 (6). pp. 567-576.
Karle, Isabella L and Flippen-Anderson, Judith and Uma, Kuchibhotla and Balaram, Padmanabhan (1988) Aqueous channels within apolar peptide aggregates: Solvated helix of the \alpha-aminoisobutyric acid (Aib)-containing peptide $Boc-{(Aib-Ala-Leu)}_3-Aib-OMe. {2H}_2O.{CH}_3OH$ in crystals. In: Proceedings of the National Academy of Sciences of the United States of America, 85 (2). pp. 299-303.
Karle, Isabella L and Flippen-Anderson, JL and Uma, K and Balaram, Padmanabhan (1988) Aqueous channels within apolar peptide aggregates. Solvated helix of Boc-Aib-Ala-Leu-Aib-Ala-Leu-Aib- -Ala-Leu-Aib-OMe. H2O.CH3OH. In: Proceedings Of The National Academy of Sciences of The United States Of America , 85 (2). pp. 299-303.
Karle, Isabella L and Flippen-Anderson, Judith and Sukumar, Muppalla and Balaram, Padmanabhan (1987) Conformation of a 16-residue zervamicin IIA analog peptide containing three different structural features: $3_{10}$-helix, \alpha-helix, and \beta-bend ribbon. In: Proceedings of the National Academy of Sciences of the United States of America, 84 (15). pp. 5087-5091.
Karle, Isabella L and Sukumar, Muppalla and Balaram, Padmanabhan (1986) Parallel packing of \alpha-helices in crystals of the zervamicin IIA analog Boc-Trp-Ile-Ala-Aib-Ile-Val-Aib-Leu-Aib-Pro-OMe ${2H}_2O$. In: Proceedings of the National Academy of Sciences of the United States of America, 83 (24). pp. 9284-9288.
