Saccharomyces cerevisiae classification

This chapter focuses on recent advances in our understanding of the molecular processes underlying the inheritance and functional consequences of the Saccharomyces cerevisiae prion P.SY+. An expanded discussion of the history of PSI+ including a summary of evidence supporting its classification as a yeast prion can be found in Volume 57 of Advances in Protein Chemistry (Serio and Lindquist, 2001). 

CAS 13552-11-9 EINECS/ELINCS 309-560-3 Synonyms (2S,3S,4R)-2-Amino-1,3,4-octadecanetriol 4-Hydroxyspinganine Phytosphingosine (Saccharomyces cerevisiae) Yeast phytosphingosine Classification Cl 8 trihydroxy compd. 

The relationship between metal ionic characteristics and the maximum biosorption capacity was estabUshed using QSAR models based on the classification of metal ions (soft, hard, and borderhne ions). Ten kinds of metal were selected and the waste biomass of Saccharomyces cerevisiae obtained from a local brewery was used as biosorbent. Eighteen parameters of physiochemical characteristics of metal ions were selected and correlated with Ths suggestion was made that classification of metal ions could improve the QSAR models and different characteristics were significant in correlating with ax, such as polarizing power Z /r or the first hydrolysis constant logRo or ionization potential IP. 

The influence of metal ionic characteristics on their biosorption capacity was analyzed using QSAR models. The waste biomass of Saccharomyces cerevisiae was used as biosotbent to adsorb 10 metal ions, and their maximum biosorption capacity (q was predicted by the models, values were correlated with 22 metal ionic characteristics. Among these, covalent index (X r) was crxrelated well with for all metal ions tested in the following equation q , =0.029 + 0.061 xl,r) (R =0.70). The biomass was shown to preferentially absorb soft ions, then borderline ions, and last hard ions. Classification of metal ions, for divalent ion or for soft-hard ion, could improve the linear relationship (R =0.89). 

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