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Guanine Metabolism in Carbon‐Limited Euglena gracilis
Author(s) -
SCHUIT K. E.,
BUETOW D. E.
Publication year - 1968
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.1550-7408.1968.tb02110.x
Subject(s) - euglena gracilis , euglena , guanine , nucleic acid , biochemistry , cytoplasm , metabolism , carbon 14 , rna , biology , nucleic acid metabolism , chemistry , nucleotide , chloroplast , gene , physics , quantum mechanics
SYNOPSIS. Guanine‐8‐ 3 H is not a specific label for nucleic acids in Euglena gracilis (strain SM‐L1, streptomycin‐bleached), but is incorporated into all biochemical fractions. Autoradiographic results show that guanine is metabolized in, both the nucleus and the cytoplasm of these Eugelna , but nuclear metabolism of guanine occurs only at a very low level in carbon‐limited cells. Further, carbon‐limited Euglena incorporate less total guanine than do control Euglena in a comparable time period. However, the majority of label incorporated into the nucleic acid fraction of the carbon‐limited cells is incorporated into RNA.