|
Orientation Preferences of Backbone Secondary Amide Functional Groups in Peptide Nucleic Acid Complexes: Quantum Chemical Calculations Reveal an Intrinsic Preference of Cationic D-Amino Acid-Based Chiral PNA Analogues for the P-form
|
ABSTRACT
Geometric descriptions of nonideal interresidue hydrogen bonding and backbone-base water bridging in the minor groove are established in terms of polyamide backbone carbonyl group orientation from analyses of residue junction conformers in experimentally determined peptide nucleic acid (PNA) complexes. Two types of interresidue hydrogen bonding are identified in PNA conformera in heteroduplexes with nucleic acids that adopt Mike basepair stacking. Quantum chemical calculations...
Related newspaper, magazine, and journal articles from HighBeam Research
|
EFFECT OF A HYDROGEN BONDING CARBOXAMIDE GROUP ON UNIVERSAL BASES
Collection of Czechoslovak Chemical Communications
; A number of aromatic universal base analogues have been described in the literature, but most are non-hydrogen bonding. We have examined the effect of introducing hydrogen bonding carboxamide groups onto the pyrrole ring of 5-nitroindole. The modified analogues retain universal base features, but
|
|
Thermodynamic hydrogen bonding in poly(styrene-co-acrylic acid)/poly(styrene-co-4-N,N-dimethylacrylamide) blends.(Author abstract)(Technical report)
Polymer Engineering and Science
; INTRODUCTION Most polymer pairs do not mix in the absence of specific interactions; this limits the elaboration of new materials with improved properties from polymer mixtures. It is now a well-known method to enhance the miscibility of pairs of polymers initially immiscible by the introduction of
|
|
Enzyme mimics.
Chemistry and Industry
; Enzymes catalyse nearly all living processes, but harnessing their techniques and using them in man-made molecules is proving to be a difficult task Enzymes, natural catalysts, perform a large number of tasks in biological systems. However, their applications in research chemistry or large scale
|
|
|
Organic chemistry. (Highlights).
Chemistry and Industry
; Merging metabolic engineering The new year starts with a new journal, which begins its first page with a new research field, in the first of a regular series on 'emerging areas'. In fact, neither the journal nor the field are completely new as Organic and Biomolecular Chemistry has been formed by
|
|
'The name's Bond. Hydrogen Bond.'
Tribology & Lubrication Technology
; Water is one of nature's most amazing fluids-and the hydrogen bond is the key to understanding its peculiar, eccentric and mesmerizing properties. Water is all over-two-thirds of the planet is covered by it-sometimes where we need it, sometimes not. Water is, in the words of Nobel Prize winner
|
|
Categorizing hydrogen bonding and other intermolecular interactions.(The Project Place: Information about new, current, and complete IUPAC projects and related initiatives)(Report)
Chemistry International
; The aim of this project is to take a comprehensive look at intermolecular interactions and classify them and to give a modern definition of the hydrogen bond, taking into account all current experimental and theoretical information, and including hydrogen bonded systems both in gaseous and
|
|
|
Computer simulations of membrane protein folding: Structure and dynamics
Biophysical Journal
; ABSTRACT A lattice model of membrane proteins with a composite energy function is proposed to study their folding dynamics and native structures using Monte Carlo simulations. This model successfully predicts the seven helix bundle structure of sensory rhodopsin I by practicing a three-stage
|
|
Hair 101 : Understanding the architecture of a hair shaft can help in formulating treatment products.
Global Cosmetic Industry
; COSMETICS CAN be defined as products for the treatment of dead body parts, since neither the stratum corneum nor hair shafts are vibrant with life. Of the two, hair is the least vital, since a haircut prompts neither pain nor blood flow. The skin keeps the rest of the body from oozing out, but hair
|
|
The effect of solvent on the absorption spectra of p-N,N-dimethylaminocinnamonitrile.(Chemistry)(Brief Article)
Journal of the Alabama Academy of Science
; Aromatic compounds containing both electron donor and acceptor substituents are highly polar and their UV spectra can be sensitive to solvent polarity and hydrogen bonding. The UV-visible absorption spectra of p-N,N-dimethylaminocinnamonitrile in many solvents of varying polarity and hydrogen
|
|
|
Microdomain composition and properties differences of biodegradable polyurethanes based on MDI and HDI.(methylene diphenyl diisocyanate, hexamethylene diisocyanate)(Author abstract)(Technical report)
Polymer Engineering and Science
; INTRODUCTION Segmented thermoplastic polyurethane elastomers (STPUE) have drawn the attention of many researches working in different fields due to the tunable properties of these materials. These copolymers can be described with a -[D-P-(D-Csub.x structure, where P is the used polydiol, commonly a
|