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An insertion sequence, IS1562, was identified in a Streptococcus pyogenes strain of the clinically important M1 serotype. IS1562 is located in the mga regulon between the genes coding for the M protein and the C5a peptidase, both important virulence factors. The same or similar insertion sequences were found in most S. pyogenes strains, but the chromosomal location differed among isolates.
We have identified a new cyclic-nucleotide phosphodiesterase isoform, PDE3A, and cloned its cDNA from cultured aortic myocytes. The nucleotide sequence of its coding region is similar to that of the previously cloned myocardial isoform except for the absence of the initial 300-400 nt that are present in the latter, as confirmed by reverse-transcriptase-mediated PCR, 5' rapid amplification of cDNA
Vaccin mot covid-19 – så funkar de – Vetenskap och Hälsa Hoppa till innehåll Vetenskap och hälsa Populärvetenskapligt om medicinsk forskning i Skåne Teman Podd Tidskrift Prenumerera Om webbplatsen Kontakt Sök Sök Vaccin mot covid-19 – så funkar de 2021-03-18 ⚠️ Den här artikeln är mer än 5 år gammal. Nya forskningsrön kan ha tillkommit. Bilden är en illustration av ett SARS-CoV-2-virus (rosa). De
https://www.vetenskaphalsa.se/vaccin-mot-covid-19-sa-funkar-de/ - 2026-06-27
Twenty-three isolates of Colletotrichum gloeosporioides, five isolates of C. acutatum, two isolates of C. capsici and six isolates of C. boninense associated with anthracnose disease on coffee (Coffea spp.) in Vietnam were identified based on morphology and DNA analysis. Phylogenetic analysis of DNA sequences from the internal transcribed spacer region of nuclear rDNA and a portion of mitochondria
Axolotl salamanders are powerful models for understanding how regeneration of complex body parts can be achieved, whereas mammals are severely limited in this ability. Factors that promote normal axolotl regeneration can be examined in mammals to determine if they exhibit altered activity in this context. Furthermore, factors prohibiting axolotl regeneration can offer key insight into the mechanis
A class of identification methods, proposed in [3], are based on the instrumental variable principle. This correspondence contains a continued analysis of convergence of the parameter estimates of these methods. Alternative, sufficient conditions for convergence to correct values are given. It is also shown by construction of counter-examples that the methods do not converge under general conditio
Stiff-man syndrome is a neurologic disorder characterized by progressive rigidity of skeletal muscles. Deficiency of the neurotransmitter γ- aminobutyric acid and autoantibodies to glutamic acid decarboxylase (GAD), the enzyme synthesizing γ-aminobutyric acid, are closely associated with the disorder, although the relevant antigenic epitopes have not been identified. In the present study, sera fro
Aliasing gives a lower bound for the sampling rate in ordinary spectral analysis of a time series. In parametric it appears at first sight that no such limitations are present. In this note we will obtain insight into this paradox by analyzing a simple Gauss-Markov process. We assume that a time series analysis is performed based on N samples of the series at equal spacing h. The result shows that
Relativistic fragmentation of Pb-208 has been used to produce excited states in neutron-rich nuclei with N approximate to 126. Spectroscopic information for a range of nuclei has been obtained through observing delayed gamma-ray emissions from isomeric states. Preliminary results for Pt-203,Pt-204 nuclei are presented. For the first time, excited states have been observed in Pt-203 and Pt-204. The
Protein HC (alias alpha 1-microglobulin) contains so far unidentified yellow-brown fluorescent chromophores. Several preparations of human protein HC were extracted with hexane. Most of the extracts contained a substance which, upon reversed-phase HPLC, co-eluted with all-trans- retinol and had an absorption spectrum identical to that of retinol. The substance was also, like retinol, destroyed by
Streptococcus pneumoniae and Streptococcus pyogenes are Gram-positive bacteria responsible for a wide spectrum of diseases, ranging from mild to even life-threatening. The annual global mortality rates of the bacteria amount to 1.68 million. While vaccines against S. pneumoniae are included in our medical arsenal, their efficacy is limited by poor immune responses in certain age groups or insuffic
Today, the public of society is considered to obsess of the topic of crime which daily news frequently distributes to the public by proclaiming shockingly headline regarding criminals and deviance. All tough, it seems to be an asymmetry between the public perception of crime and the characteristics of suspects versus the court's judgment of crime and the characteristics of suspects. This asymm
Climate change is expected to have the greatest impact on the world's economically poor. In the Sahel, a climatically sensitive region where rain-fed agriculture is the primary livelihood, expected decreases in water supply will increase food insecurity. Studies on climate change and the intensification of the water cycle in sub-Saharan Africa are few. This is due in part to poor calibration of mo
Combustion, present in a vast majority of energy and material production as well as in transportation, represents a foundation of our modern society. To improve and optimize the applications relying on combustion demand a high level of knowledge, and an ability to simulate the combustion process. To do so three-dimensional Computational Fluid Dynamic (CFD) combustion simulations can be used, where
