Yeast physiology

Xem 1-12 trên 12 kết quả Yeast physiology
  • Controlling the impact of stress on brewing biomass, predicting yeast activity and ensuring consistent fermentation performance through successive fermentations remain areas of active interest for the brewing industry. To be able to control and perhaps even manipulate yeast activity, it is necessary to identify factors that affect its functionality during fermentation. Genetic stability and integrity are crucial to maintaining predictable performance.

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  • I HAVE selected to-night the particular subject of Yeast for two reasons—or, rather, I should say for three. In the first place, because it is one of the simplest and the most familiar objects with which we are acquainted. In the second place, because the facts and phenomena which I have to describe are so simple that it is possible to put them before you without the help of any of those pictures or diagrams which are needed when matters are more complicated, and which, if I had to refer to them here, would involve the necessity of my...

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  • The summer/winter difference in plasma volume may be related to the regularly observed summer fall in red blood cell values and total protein. In a fully dehydrated camel with 65% body water, alimentary water has been reported as 12%, which is similar to the figure for tropical cattle. The total water content of the camel is considerably greater in hot dry weather (up to 75%) than in cooler periods (down to 50%), which indicates its physiological water conserving capability.

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  • Economic demands to intensify the brewing process and increase the fermenter productivity have stimulated interest in high-gravity brewing. However, increasing wort sugar concentration can have a detrimental effect on fermentation performance, adversely affecting yeast physiology and altering the physical and flavor properties of the beer product. Many methods such as: higher pitching rates, higher fermentation temperatures, more efficient aeration than in conventional brewing, and immobilised yeast were used to improve this process....

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  • For elucidating protein–protein interactions, many methodologies have been developed during the past two decades. For investigation of interac-tions inside cells under physiological conditions, yeast is an attractive organism with which to quickly screen for hopeful candidates using versa-tile genetic technologies, and various types of approaches are now avail-able.

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  • Sec14p of the yeastSaccharomyces cerevisiaeis involved in protein secretion and regulation of lipid synthesis and turnover in vivo, but acts as a phosphatidylinositol–phos-phatidylcholine transfer proteinin vitro. In this work, the five homologues of Sec14p, Sfh1p–Sfh5p, were subjected to biochemical andcell biological analysis toget abetter viewof their physiological role. We show that overexpression of SFH2andSFH4suppressed thesec14growth defect in a more andSFH1in a less efficient way, whereas overexpres-sion ofSFH3andSFH5did not complementsec14....

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  • Tham khảo sách 'the vitamine manual', y tế - sức khoẻ, y học thường thức phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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  • Transgenic Mice as Models of Genetic Disease Several organisms have been studied extensively as genetic models, including Mus musculus (mouse), Drosophila melanogaster (fruit fly), Caenorhabditis elegans (nematode), Saccharomyces cerevisiae (baker's yeast), and Escherichia coli (colonic bacterium). The ability to use these evolutionarily distant organisms as genetic models that are relevant to human physiology reflects a surprising conservation of genetic pathways and gene function.

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  • Casein kinases I (CKI) are serine/threonine protein kinases widely expressed in a range of eukaryotes including yeast, mammals and plants. They have been shown to play a role in diverse physiological events including membrane trafficking. CKIa is associated with synaptic vesicles and phosphorylates some synaptic vesicle associated proteins including SV2. In this report, we show that syntaxin-1A is phosphorylated in vitro by CKI on Thr21.

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  • The interaction between the human copper(I) chaperone, HAH1, and one of its two physiological partners, the Menkes disease protein (ATP7A), was investigated in solution using heteronuclear NMR. The study was carried out through titrations involving HAH1 and either the second or the fifth soluble domains of ATP7A (MNK2 and MNK5, respectively), in the pres-ence of copper(I). The copper-transfer properties of MNK2 and MNK5 are similar, and differ significantly from those previously observed for the yeast homologous system. ...

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  • The humanSUV3gene encodes an NTP-dependent DNA⁄RNA DExH box helicase predominantly localized in mitochondria. Its orthologue in yeast is a component of the mitochondrial degradosome complex involved in the mtRNA decay pathway. In contrast to this, the physiological func-tion of human SUV3remains to be elucidated. In this report we demon-strate that the hSuv3 protein interacts with HBXIP, previously identified as a cofactor of survivin in suppression of apoptosis and as a protein that binds the HBx protein encoded by the hepatitis B virus....

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  • We used parameter scanning to emulate changes to the limitingrate for steps inafittedmodel of glucose-derepressed yeast glycolysis. Three flux-control regimes were observed, two of which were under the dominant control of hexose transport, in accordance with various experimental studies andothermodel predictions.

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