منابع مشابه
How cations change peptide structure.
Specific interactions between cations and proteins have a strong impact on peptide and protein structure. Herein, we shed light on the nature of the underlying interactions, especially regarding effects on the polyamide backbone structure. This was done by comparing the conformational ensembles of model peptides in isolation and in the presence of either Li(+) or Na(+) by using state-of-the-art...
متن کاملDNA structure: cations in charge?
Recent X-ray diffraction, NMR spectroscopy and molecular mechanics results suggest that monovalent cations selectively partition into the minor groove of AT-tracts in DNA. These observations are consistent with DNA deformation by electrostatic collapse around areas of uneven cation density. This model predicts the occurrence of known DNA deformations, such as AT-tract bending and changes in the...
متن کاملDivalent cations levels change in nephrotic syndrome.
UNLABELLED Divalent cations (calcium, magnesium, zinc, cooper, manganese) play an important role in various biological processes. Different acute or chronic renal disorders in children or adults modify the urinary excretion of these cations and may influence their concentrations in organism. AIM Evaluation of the changes of some divalent cations levels (Cu, Zn, Mg, Ca) in acute renal diseases...
متن کاملEpistemic Structure: How Agents Change the World for Cognitive Congeniality
A two-part model is presented to explain how some organisms and humans add structure to the world to reduce cognitive complexity. Some philosophical possibilities of this model are then outlined, which include a situated cognition explanation of representation and intentionality. Many organisms generate stable structures in the world to reduce cognitive complexity (minimize search or inference)...
متن کاملCharge transfer dissociation (CTD) mass spectrometry of peptide cations using kiloelectronvolt helium cations.
A kiloelectronvolt beam of helium ions is used to ionize and fragment precursor peptide ions starting in the 1+ charge state. The electron affinity of helium cations (24.6 eV) exceeds the ionization potential of protonated peptides and can therefore be used to abstract an electron from--or charge exchange with--the isolated precursor ions. Kiloelectronvolt energies are used, (1) to overcome the...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Chemistry - A European Journal
سال: 2013
ISSN: 0947-6539
DOI: 10.1002/chem.201204554