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On Hemoglobin Inhibition of the Growth of Euglena gracilis
Author(s) -
COELHO J.,
REGE D. V.
Publication year - 1963
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.1550-7408.1963.tb01708.x
Subject(s) - euglena gracilis , hemoglobin , divalent , euglena , inhibitory postsynaptic potential , biochemistry , chemistry , heme , biology , biophysics , enzyme , endocrinology , organic chemistry , chloroplast , gene
SYNOPSIS. The inhibitory principle in whole blood for strains of Euglena gracilis has been characterized and identified as hemoglobin. Hemoglobins from different sources were tested for their inhibitory activity and gave similar results. The inhibition was reversed by raising the concentration of certain divalent metal ions, calcium in particular in the basal growth medium. The nature of the inhibition was studied. Heme and other porphyrins related to hemoglobin stimulated the growth of Euglena gracilis in light. Implications of these findings are discussed.