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Neonicotinoid insecticides are agonists to nicotinic acetylcholine receptors (nAChRs) in the brains of insects. At sub-lethal doses these chemicals cause behavioral abnormalities in several bee species, reducing overall fitness. nAChRs expressed in the optic lobes of insects bind neonicotinoids, thus may be involved in these behavioral changes. Here we attempted without success to visualize the pr
Polär tillväxt i antibiotikaproducerande bakterier Bakterier som tillhör släktet Streptomyces är jordlevande bakterier som är kända för att producera antibiotika av olika slag, samt att de ger jorden dess karaktäristiska doft. Deras syntes av olika antibiotika är av stor betydelse för vårt samhälle och den är kopplad till deras tillväxtstadie. Det är därför av intresse att försöka skapa en bättre
Escherichia coli, en proteinfabrik Under de senaste åren har det skett en stor utveckling av system för produktion av rekombinanta proteiner i mikroorganismer. Detta har stor betydelse för dess användning till exempel inom läkemedelsindustrin. Ett rekombinant protein kodas av rekombinant DNA, vilket skapas när DNA från olika organismer sammanfogas till exempel när man sätter in en gen från en art
Baggar, vind och en massa skit Efter att ha hittat en dynghög så börjar den sydafrikanska dyngbaggen Scarabaeus lamarcki konstruera en boll. Till skillnad från dig och mig så älskar dessa baggar dynga, och bollens slutdestination är baggens mage. Innan dyngbaggen kan hugga in så måste den ta sig bort från dynghögen och den ökande konkurrensen. Det snabbaste sättet att komma ifrån högen med alla a
Oxidativ stress i celler är en bakomliggande faktor till många dödliga sjukdomar. Detta kan kroppen reglera till en viss del med olika proteiner. Ett av proteinerna är Alfa-1-mikroglobulin (A1M) som kan sänka oxidativ stress i kroppen genom att t.ex binda till fria radikaler och bidra till vävnadsreperation. A1M transkriberas tillsammans med ett annat protein, bikunin, som har anti-inflammatoriska
A system for detecting protein-protein interaction using a bacterial two-hybrid approach, a heterologous expression system in Escherichia coli strain based on adenylate cyclase enzyme reconstitution, was invented twenty years ago (Karimova, et al., 1998, PNAS, 95:5752). Before inventing this system, yeast two-hybrid technology was used for screening putative interaction between either two proteins
Kan sorkar med mutationer slippa undan infektioner? Sjukdomar är ett av de största hoten som alla levande varelser kan utsättas för. Lyckligtvis har alla djur ett immunförsvar som försöker bekämpa dessa sjukdomar. Detta försvar består av många komponenter vars ritningar finns nedskrivna i DNA. Mutationer, som förändrar DNA, kan leda till olika variationer av en gen, och olika varianter kan påverk
Customer Support is usually an expensive service for a lot of companies. At Telavox, a majority of the support tickets are sent via e-mail. A support ticket is sent by a customer, containing a request for support. Support tickets from customers could reveal valuable information. Additional insights can be given by labelling the tickets. Today, employees at the customer support department at Telavo
Room acoustics, as a branch of architectural acoustics, has got more and more attention nowadays. One of the aims of the room acoustics is to develop different method to evaluate the acoustic performance of the rooms and to address human acoustic comfort needs. Meanwhile, the process of reverberation plays an important role in room acoustics, and it is also an evaluation standard of evaluating roo
Peter Strawson’s ‘Freedom and Resentment’ (1962) has reoriented the way moral philosophers think about responsibility. There is a general sense that Strawson’s approach holds the promise that we may move beyond the traditional discussion of free will in recognition of the fact that whether determinism is true is irrelevant for whether we are responsible beings. This is Strawson’s Promise. This the
Target-controlled infusion (TCI) constitutes a clinically available alternative to manually administering the infusion rate of the anesthetic drug propofol. In TCI, a drug infusion profile is optimized to track a reference trajectory of blood plasma or effect site (brain cortex) drug concentration, or a corresponding clinical effect. TCI is a pure feed-forward openloop strategy, fully reliant on a
ObjectiveTo study the cumulative live birth rate (CLBR) after the first in vitro fertilization (IVF) or intracytoplasmic sperm injection (ICSI) treatment in women with or without deep-infiltrating endometriosis (DIE) and/or endometrioma diagnosed by transvaginal ultrasonography (TVUS), using the International Deep Endometriosis Analysis (IDEA) group definitions.DesignProspective observational coho
IntroductionStudies that use standardized ultrasonographic criteria to diagnose adenomyosis in subfertile women are needed. These would improve the understanding of the disease burden and enable further studies on its impact on fertility and assisted reproductive treatment (ART) outcome. The aim of this study was to determine the prevalence of different features of adenomyosis in women scheduled f
Inactivation of the yeast nonsense-mediated mRNA decay (NMD) pathway stabilizes nonsense mRNAs and promotes readthrough of premature translation termination codons. Although the latter phenotype is thought to reflect a direct role of NMD factors in translation termination, its mechanism is unknown. Here we show that the reduced termination efficiency of NMD-deficient cells is attributable to incre
The conserved pre-mRNA retention and splicing (RES) complex, which in yeast consists of Bud13p, Snu17p and Pml1p, is thought to promote nuclear retention of unspliced pre-mRNAs and enhance splicing of a subset of transcripts. Here, we find that the absence of Bud13p or Snu17p causes greatly reduced levels of the modified nucleoside N(4)-acetylcytidine (ac(4)C) in tRNA and that a lack of Pml1p redu
The translational decoding properties of tRNAs are modulated by naturally occurring modifications of their nucleosides. Uridines located at the wobble position (nucleoside 34 [U(34)]) in eukaryotic cytoplasmic tRNAs often harbor a 5-methoxycarbonylmethyl (mcm(5)) or a 5-carbamoylmethyl (ncm(5)) side chain and sometimes an additional 2-thio (s(2)) or 2'-O-methyl group. Although a variety of models
Nonsense-mediated mRNA decay (NMD) is a surveillance mechanism that detects and degrades transcripts containing premature translation termination codons. Gene expression profiling experiments have shown that inactivation of the NMD pathway leads to the accumulation of both aberrant, nonsense-containing mRNAs, and many apparently wild-type transcripts. Such increases in transcript steady-state leve
The Saccharomyces cerevisiae Elongator complex consisting of the six Elp1-Elp6 proteins has been proposed to participate in three distinct cellular processes: transcriptional elongation, polarized exocytosis, and formation of modified wobble uridines in tRNA. Therefore it was important to clarify whether Elongator has three distinct functions or whether it regulates one key process that leads to m
