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The effects of glucose and oxygen on the cytochromes and metabolic activity of yeast batch cultures. I. Saccharomyces spp.
Author(s) -
Rickard Pamela A. D.,
Moss F. J.,
Ganez Micheline
Publication year - 1971
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260130102
Subject(s) - catabolism , yeast , saccharomyces , biochemistry , anabolism , saccharomyces cerevisiae , oxygen , respiration , fermentation , chemistry , biology , metabolism , botany , organic chemistry
Saccharomyces cerevisiae and Saccharomyces carlsbergensis were grown in batch culture with and without oxygen control. The concentrations of A‐, B‐ and C‐type cytochromes of both yeasts were dependent on the oxygen concentration during growth as well as on the initial glucose concentration of the growth medium. S. cerevisiae cytochromes were maximal after growth in low glucose and low oxygen; S. carlsbergensis cytochromes were maximal after growth in low glucose and high oxygen. Except when glucose was in very low concentration, its catabolism by S. carlsbergensis was directed predominantly towards ethanolic fermentation regardless of the oxygen concentration. Growth rate, total cell mass and yield were maximal, and anabolism was closely balanced with catabolism, when glucose and oxygen of S. carlsbergensis cultures were both high. Under these conditions neither catabolism, respiratory or ethanolic, nor glucose uptake were maximal.