Conventional medicine’s

The dinitrogenase component proteins of the conventional Mo nitrogenase (MoFe protein) and of the alternative Fe-only nitrogenase (FeFe protein) were both isolated and purified from Rhodobacter capsulatus, redox-titrated according to the same procedures and subjected to an EPR spectroscopic comparison. In the course of an oxidative titration of the MoFe protein (Rc1Mo) three significant S ¼ 1/2 EPR signals deriving from oxidized states of the P-cluster were detected: (1) a rhombic signal (g ¼ 2.07, 1.96 and 1.

12p system191 01-06-2013 31 4   Download

Conventional and saturation transfer electron paramagnetic resonance spectroscopy (EPR and ST EPR) was used to study the orientation of probe molecules in muscle fibers in different intermediate states of the ATP hydrolysis cycle. A separate procedure was used to obtain ST EPR spectra with precise phase settings even in the case of samples with low spectral intensity. Fibers prepared from rabbit psoas muscle were labeled with isothiocyanate spin labels at the reactive thiol sites of the catalytic domain of myosin....

10p research12 01-06-2013 38 6   Download

Human interleukin-11 (hIL-11) is a pleiotropic cytokine that is involved in numerous biological activities such as hematopoiesis, osteoclastogenesis, neurogenesis and female fertility. IL-11 is obviously a key reagent to study the IL-11 receptors. However, conventional radio-iodination techni-ques lead to a loss of IL-11 bioactivity. Here, we report the construction and the production of a new recombinant human IL-11 (FPDIL-11). In this molecule, a speci®c phosphorylation site (RRASVA) has been introduced at the N-terminus of rhIL-11. ...

8p research12 29-04-2013 30 4   Download

Nacre organic matrix has been conventionally classified as both
water-soluble and
water-insoluble,basedonits solubility in aqueous solutions after decalcificationwith acid or EDTA. Some characteristics (aspartic acid-rich, silk-fibroin-like content) were specifically attributed to either one or the other. The comparative study on the technique of extraction (extraction with water alone vs. demineralization with EDTA) presented here, seems to reveal that this gen-erally accepted classification may need to be reconsidered....

10p tumor12 22-04-2013 33 2   Download

Pi4 is a38-residue toxincross-linkedby fourdisulfidebridges that has been isolated from the venom of the Chactidae scorpion Pandinus imperator. Together with maurotoxin, Pi1, Pi7 andHsTx1, Pi4belongs to theaKTX6 subfamilyof short four-disulfide-bridged scorpion toxins acting on K + channels. Due to its very low abundance in venom, Pi4 was chemically synthesized in order to better characterize its pharmacology and structural properties.

10p tumor12 20-04-2013 31 1   Download

In recent years major progress has been made in elucidating the mechanism and structure of catalytic RNA molecules, and we are now beginning to understand ribozymes well enough to turn them into useful tools. Work in our laboratory has focused on the development of twin ribozymes for site-specific RNA sequence alteration. To this end, we followed a strategy that relies on the combination of two ribozyme units into one molecule (hence dubbed twin ribozyme).

11p fptmusic 11-04-2013 41 2   Download

Laccase-catalyzed polymerization of tyrosine and tyrosine-containing pep-tides was studied in the presence and absence of ferulic acid (FA). Advanced spectroscopic methods such as MALDI-TOF MS, EPR, FTIR microscopy and HPLC-fluorescence, as well as more conventional analyt-ical tools: oxygen consumption measurements and SDS⁄PAGE were used in the reaction mechanism studies. Laccase was found to oxidize tyrosine and tyrosine-containing peptides, with consequent polymerization of the compounds.

11p fptmusic 11-04-2013 34 3   Download

With the amount of genetic information available, a lot of attention has focused on systems biology, in particular biomolecular interactions. Con-sidering the huge number of such interactions, and their often weak and transient nature, conventional experimental methods such as X-ray crystal-lography and NMR spectroscopy are not sufficient to gain structural insight into these. A wealth of biochemical and⁄or biophysical data can, however, readily be obtained for biomolecular complexes.

20p awards 05-04-2013 46 3   Download

The cAMP response element consensus sequence directs the transcription of a wide range of genes. A 24-mer single-stranded cAMP response element decoy oligonucleotide (CDO) has been shown to compete with these sequences for binding transcription factors and therefore interferes with cAMP-induced gene transcription. We have examined the effect of this CDOalone and in combinationwith a range of common chemotherapeutic agents in colorectal cancer cell lines.

9p dell39 03-04-2013 40 6   Download

The expression of the colonic mitochondrial 3-hydroxy 3-methyl glutaryl CoA (mHMGCoA) synthase,a key con-trol site of ketogenesis from butyrate,is lower in germ-free (GF) than in conventional (CV) rats. In contrast,the activity of glutaminase is higher. The objective of this study was to investigate whether the intestinal flora can affect gene expression through short chain fatty acid (SCFA) and butyrate production. GF rats were inoculated with a con-ventional flora (Ino-CV) orwitha bacterial strainproducing butyrate (Clostridium paraputrificum,Ino-Cp) or not (Bifidobacterium breve,Ino-Bb).

9p dell39 03-04-2013 28 4   Download

Membrane proteins are highly underrepresented in structural data banks due to tremendous difficulties that occur upon approaching their structural analysis. Inefficient sample preparation from conventional cellular expres-sion systems is in many cases the first major bottleneck.

13p inspiron33 25-03-2013 44 4   Download

Disulfide bonds are required for the stability and function of a large num-ber of proteins. Recently, the results from genome analysis have suggested an important role for disulfide bonds concerning the structural stabilization of intracellular proteins from hyperthermophilic Archaea and Bacteria, contrary to the conventional view that structural disulfide bonds are rare in proteins from Archaea.

16p inspiron33 25-03-2013 36 5   Download

Employing transgenic plants as alternative systems to the conventional Escherichia coli, Pichia pastorisor baculovirus hosts to produce recombin-ant allergens may offer the possibility of having available edible vaccines in the near future. In this study, two EF-hand-type Ca 2+ -binding allergens from olive pollen, Ole e 3 and Ole e 8, were produced in transgenic Arabid-opsis thaliana plants.

10p inspiron33 25-03-2013 40 3   Download

Enzymes have become an attractive alternative to conventional catalysts in numerous industrial processes. However, their properties do not always meet the criteria of the application of interest. Directed evolution is a powerful tool for adapting the characteristics of an enzyme.

15p galaxyss3 19-03-2013 40 4   Download

The Tec family tyrosine kinase interleukin-2 inducible T-cell kinase (Itk) is predominantly expressed in T cells and has been shown to be critical for the development, function and differentiation of conventional abT cells. However, less is known about its role in nonconventional T cells such as NKT andcdT cells.

10p cosis54 05-01-2013 42 5   Download