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Some Characteristics of Ethanol Metabolism in Euglena gracilis var. bacillaris *
Author(s) -
ESHLEMAN JUDITH N.,
DANFORTH WILLIAM F.
Publication year - 1964
Publication title -
the journal of protozoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.067
H-Index - 77
eISSN - 1550-7408
pISSN - 0022-3921
DOI - 10.1111/j.1550-7408.1964.tb01769.x
Subject(s) - euglena gracilis , ethanol , respiratory quotient , respiration , metabolism , ethanol metabolism , chemistry , euglena , biochemistry , intracellular , stimulation , botany , biology , endocrinology , chloroplast , gene
SYNOPSIS. Respiration of nonphotosynthetic Euglena gracilis var. bacillaris is maximally stimulated by 10–30 on ethanol; lower ethanol concentrations produce lesser stimulation. The rate of respiration on ethanol is independent of pH (pH 3.0–9.0). Acetate‐grown and ethanol‐grown cells are similar in these respects. The respiratory quotient of ethanol metabolism is 0.30, and 0.966 mole O 2 is consumed per mole of ethanol utilized. Constancy of the respiratory quotient and O 2 : ethanol ratio with time indicates that there is no transitory accumulation of partially oxidized intermediates during ethanol metabolism. A variety of tests indicate that oxidation of intracellular reserves continues during ethanol metabolism.