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BIPHASIC TIME COURSE OF SOLUBILIZATION OF NITROGENASE DURING CAVITATION OF AEROBICALLY GROWN ANABAENA CYLINDRICA 1
Author(s) -
Wolk C. Peter,
Wojciuch Elizabeth
Publication year - 1971
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.1971.tb01529.x
Subject(s) - nitrogenase , heterocyst , biology , anabaena , algae , tungstate , botany , molybdenum , biochemistry , biophysics , nitrogen fixation , cyanobacteria , inorganic chemistry , chemistry , bacteria , genetics
SUMMARY The nitrogenase activity of extracts from aerobically grown. Anabaena cylindrica is proportional to the cube of the concentration of extract over a wide range of activities. This relationship is changed to one of direct proportionality, approximately, when reaction mixtures are supplemented with a constant amount of extract from algae starved for molybdenum in the presence of tungstate. The time course of solubilization of nitrogenase during cavitation is reevaluated in the light of these results. The finding that solubilization occurs at first rapidly and subsequently much more slowly is discussed with reference to the hypothesis that nitrogenase is localized in heterocysts.