Alpha factor

ALPHA BF (days) Baseflow alpha factor. The baseflow recession constant is a direct index of groundwater flow response to changes in recharge. This parameter can vary between 0 and 1, with values in the range 0.1-0.3 for a land with slow response to recharge, and 0.9-1.0 for a land with a rapid response. 

Yesilaltay, A. and Jenness, D. D. (2000) Homo-oligomeric complexes of the yeast alpha-factor pheromone receptor are functional units of endocytosis. Mol. Biol. Cell. 11,2873-2884. 

Tang, X., et al. (2005) LPS induces the interaction of a transcription factor, LPS-induced TNF-alpha factor, and STAT6(B) with effects on multiple cytokines. Proc Natl Acad Sci U S A. 102, 5132-7. 

Bush, G.L., A.M.Tassin, H.FridenandD.L.Meyer. (1991) Secretion in yeast. Purification and in vitro translocation of chemical amounts of prepro-alpha-factor. J Biol Chem., 266, 13811-13814. 

Use of scavengers. Can fert-butyl alcohol (TBA) be applied without constraints in reaction kinetic measurements No, TBA influences the kLa-value considerably (alpha factor). B 3.2.2... 

Historically, the alpha factor, a, was developed from oxygen mass transfer studies in the aerated basins of municipal waste water treatment plants. It thus denotes the ratio of the mass transfer coefficient for oxygen measured in the waste water (WW) to that measured in tap water (TP). 

The decrease in the alpha factor to values below a = 1 can be due to a decrease in either kL or a or both. Two theories are commonly used to explain the reduction in kp. the barrier effect and the hydrodynamic effect. In the barrier theory, the presence of the surfactants at the phase interface creates an additional resistance to mass transfer due to diffusion through the surfactant layer. In the hydrodynamic theory, the layer of surfactant molecules at the gas-liquid interface depresses the hydrodynamic activity (Gurol and Nekouinaini, 1985). 

Solvents and solids, as well as water constituents, can have varying influences on kLa, depending not only on their properties but also on the hydrodynamics of the system (as discussed in Section B 3.2). Therefore, the kLa and the alpha-factor (ratio of kLa in the three-phase-system to the one in water) in the three-phase system under operating conditions similar to the ozonation experiments should always be determined. 

For expression of the polyphenolic protein, the coding sequence is inserted into an expression cassette composed of a promoter, translation initiation sequence, signal sequence, and transcription terminator. The promoter sequence in YpGX285 is derived from two yeast genes, GAL1 (32) and alpha factor (MF-al) (25). This hybrid promoter provides for efficient, regulated, transcription of... 

Kuqan, J. (1985). Alpha-factor structural gene mutations in Saccharomyces cerevisiae effects on alpha-factor production and mating. Mol Cell Biol 5 787-796. 

Kuqan, J., and Herskowitz, I. (1982). Structure of a yeast pheromone gene (MF alpha) a putative alpha-factor precursor contains four tandem copies of mature alpha-factor. Cell 30 933-943. 

Julius, D., Blair, L., Brake, A., Sprague, G., and Thorner, J. (1983). Yeast alpha factor is processed from a larger precursor polypeptide the essential role of a membrane-bound dipeptidyl aminopeptidase. Cell 32 839-852. 

Naider, F., and Becker, J.M. (2004). The alpha-factor mating pheromone of Saccharomy-ces cerevisiae a model for studying the interaction of peptide hormones and G protein-coupled receptors. Peptides 25 1441-1463. 

For an acidic analyte HA, the alpha-factors mentioned above will take the following form ... 

The posttranslational import of yeast prepro-alpha factor into the ER was stimulated by the addition of a yeast postribosomal supernatant. This assay was used to purify two cytosolic members of the yeast Hsp70 family (Chirico et al., 1988). Similarly, while the import of a preprotein translated from wheat germ lysate could not be imported into yeast mitochondria, addition of yeast cytosolic Hsp70 (as well as another unidentified component) could restore this defect (Murakami etal., 1988). 

The structure of a growing crystal surface at its interface with the growth medium, e.g. a supersaturated solution, has an important bearing on the particular mode of crystal growth adopted. This property has been characterized by a quantity variously designated as a surface roughness or surface entropy factor, or more frequently nowadays simply as the alpha factor (Jack-son, 1958 Tempkin, 1964 Bennema and van der Eerden, 1977) which may be defined by... 

A calibration reference matrix is used to define the line C = (D + ERXIOO + cKij AC ), in which C is concentration, E the reciprocal of the slope, R the intensity ratio of unknown ekment to calibration reference, and D the intercept on the concentration axis. ACj represents the concentrations of all elements j in mid-concentration range. The D + ER term is independent of matrix effects and the constants E and D can be reevaluated from time to time and if necessary updated, for example, if an x-ray tube has to be replaced. For the reasons already stated, the least accurately known factor in the intensity/concentration equation is the alpha factor, but the overall effect of the total correction term relative to the D + ER term can be reduced by careful choice of the calibration range. 

PARK E M, KIM Y 0, NAM B H, KONG H J, KIM W J, LEE S J, KONG I S, CHOI T J (2008), Cloning, characterization and expression analysis of the gene for a putative lipopolysac-charide-induced TNF-alpha factor of the Pacific oyster, Crassostrea gigas. Fish Shellfish Immunol, 24,11-17. 

YU Y, QIU L, SONG L, ZHAO J, NI D, ZHANGM Y, XU w (2007), Molecular cloniug and characterization of a putative hpopolysaccharide-induced TNF-alpha factor (LITAF) gene homologue from Zhikong scallop Chlamys farreri. Fish Shellfish Immunol, 23,419—429. 

ZHANG D, JIANG J, JIANG s, MA J, su T, QIU L, ZHU c, XU X (2009), Molecular characterization and expression analysis of a putative LPS-induced TNF-alpha factor (LITAF) from pearl oyster Pinctada fucata. Fish Shellfish Immunol, 27,391-396. 

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