Search results for "vidi"

Alteration of poly (ADP-Rib) synthesis during progesterone- caused gene expression in oviducts of quails.

1976

Summary The biological model of the selective induction of RNA synthesis in oviducts of estrogen stimulated immature quails by progesterone has been used to clarify whether poly (ADP-Rib) is involved in DNA transcription. The chromatin-bound as well as the soluble poly (ADP-Rib) polymerase has been isolated from oviducts and the optimal reaction conditions have been determined. The activities, as measured by the incorporation rates of NAD + into poly (ADP-Rib), of both, chromatin-bound « endogenouspolymerase (in the absence of « exogenousDNA and histones) and soluble enzyme (native DNA - lysine-rich histone ratio: 4.3) from progesterone treated quail oviducts, have been determined to be onl…

Oligodendrocytes in mouse corpus callosum are coupled via gap junction channels formed by connexin47 and connexin32.

2010

According to previously published ultrastructural studies, oligodendrocytes in white matter exhibit gap junctions with astrocytes, but not among each other, while in vitro oligodendrocytes form functional gap junctions. We have studied functional coupling among oligodendrocytes in acute slices of postnatal mouse corpus callosum. By whole-cell patch clamp we dialyzed oligodendrocytes with biocytin, a gap junction-permeable tracer. On average 61 cells were positive for biocytin detected by labeling with streptavidin-Cy3. About 77% of the coupled cells stained positively for the oligodendrocyte marker protein CNPase, 9% for the astrocyte marker GFAP and 14% were negative for both CNPase and GF…

Production of biologically active recombinant avidin in baculovirus-infected insect cells

1997

Abstract An efficient lepidopteran insect cell system was established for the expression of a recombinant form of chicken egg-white avidin. The gene product was obtained in both secreted and intracellular forms, and biologically active recombinant avidin was isolated using affinity chromatography on an iminobiotin–agarose column. Similar to the known quaternary structure of the native egg-white protein, the purified recombinant protein was glycosylated and assembled mainly into tetramers. Like native avidin, the recombinant tetramer also exhibited a high level of thermostability, and was further stabilized upon binding biotin. The biotin-binding and structural properties of the recombinant …

Thin-layer affinity chromatography in analysis of protein-ligand affinity.

1996

Novel avidin-like protein from a root nodule symbiotic bacterium, Bradyrhizobium japonicum.

2005

Bradyrhizobium japonicum is an important nitrogenfixing symbiotic bacterium, which can form root nodules on soybeans. These bacteria have a gene encoding a putative avidin- and streptavidin-like protein, which bears an amino acid sequence identity of only about 30% over the core regions with both of them. We produced this protein in Escherichia coli both as the full-length wild type and as a C-terminally truncated core form and showed that it is indeed a high affinity biotin-binding protein that resembles (strept)avidin structurally and functionally. Because of the considerable dissimilarity in the amino acid sequence, however, it is immunologically very different, and polyclonal rabbit and…

Proteome-Wide Characterization of the RNA-Binding Protein RALY-Interactome Using the in Vivo-Biotinylation-Pulldown-Quant (iBioPQ) Approach

2013

RALY is a member of the heterogeneous nuclear ribonucleoproteins, a family of RNA-binding proteins generally involved in many processes of mRNA metabolism. No quantitative proteomic analysis of RALY-containing ribonucleoparticles (RNPs) has been performed so far, and the biological role of RALY remains elusive. Here, we present a workflow for the characterization of RALY's interaction partners, termed iBioPQ, that involves in vivo biotinylation of biotin acceptor peptide (BAP)-fused protein in the presence of the prokaryotic biotin holoenzyme synthetase of BirA so that it can be purified using streptavidin-coated magnetic beads, circumventing the need for specific antibodies and providing e…

Il discorso sui 'metalla' fra ideologia, poetica e retorica. Da Cicerone a Prudenzio

2002

L'articolo mira a ricostruire, attraverso un percorso per sondaggi e campioni, l'ampio dibattito sviluppato dalla cultura latina intorno al tema dello sfruttamento delle risorse minerarie in un arco di tempo che va dalla tarda repubblica al V secolo d. C. Analizzando una serie di testi appartenenti ad epoche, generi ed autori diversi (Cicerone, Ovidio, Manilio, Seneca, Lucano, Silio Italico, Tiberiano, Prudenzio) si pone in luce la natura eminentemente etico-culturale, e assai spesso moralistica, dell'interesse mostrato dagli scrittori latini per questo tipo di tematiche. Al contempo, tuttavia, si segnala un significativo slittamento prospettico nelle varie fasi della storia culturale roman…

Probing human beta1- and beta2 -adrenoceptors with domain-specific fusion protein antibodies.

1997

In order to generate antibodies suitable for immunological studies on beta-adrenoceptors constitutively expressed at low levels in cells or tissues we have produced fusion proteins of the amino- and carboxy-terminus, and the second extracellular loop of the human beta 1- or beta 2-adrenoceptors with bacterial glutathione-S-transferase in E. coli. Rabbit antibodies raised against these fusion proteins strongly reacted with intact human beta 1- or beta 2-adrenoceptors in a subtype- and domain-specific manner. Antibodies directed against the second extracellular loop of the beta 1-adrenoceptor reacted stronger with non-denatured receptors and decreased the affinity of the 3H-labelled antagonis…

Targeting of biotinylated compounds to its target tissue using a low-density lipoprotein receptor–avidin fusion protein

2003

The very high binding affinity of avidin to biotin is one of the highest to occur in nature. We constructed a fusion protein composed of avidin and the endocytotic LDL receptor in order to target biotinylated molecules to cells of the desired tissues. In addition to the native avidin, charge-mutated and nonglycosylated avidins were utilized as part of the fusion proteins, in order to modify its properties. All of the fusion protein versions retained the biotin-binding capacity. Although the specificity was not increased, however, fusion proteins composed of natural avidin and nonglycosylated avidin bound most efficiently to the biotinylated ligands. Fluorescence microscopy and atomic force …

A/S ”Preiļu siers” finanšu analīze

2015

Uzņēmuma finanšu stāvokļa izvērtēšana ir svarīgs priekšnosacījums tālākai uzņēmuma attīstības plānu izstrādei. Bakalaura darba mērķis ir, pamatojoties uz A/S ”Preiļu siers” finanšu pārskatu izpēti un analīzi, izstrādāt priekšlikumus uzņēmuma darbības pilnveidošanai. Darbs sastāv no četrām nodaļām, teorētiskajā daļā aplūkoti finanšu analīzes koeficienti, kā arī sniegts uzņēmuma un piena nozares raksturojums, bet praktiskajā daļā, balstoties uz A/S ”Preiļu siers” pārskatiem veikta uzņēmuma finanšu analīze un salīdzinājums ar tā konkurentu A/S ”Valmieras piens” un pārtikas produktu ražošanas nozari. Darba noslēgumā apkopoti secinājumi un izstrādāti priekšlikumi. Bakalaura darba apjoms ir 61. l…