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NITRATE REDUCTASE MUTANTS IN EUDORINA ELEGANS (CHLOROPHYCEAE) 1
Author(s) -
Toby Anne L.,
Kemp C. Lindley
Publication year - 1977
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.1529-8817.1977.tb02944.x
Subject(s) - nitrate reductase , mutant , biology , nitrite reductase , hypoxanthine , reductase , nitrate , chlorophyceae , biochemistry , enzyme , wild type , nitrite , botany , microbiology and biotechnology , gene , algae , ecology , chlorophyta
Three nitrate reductase mutants were independently isolated and characterized in the colonial alga, Eudorina elegans Ehrenberg. nar‐1 is a leaky mutant, deficient in the production of nitrate reductase. nar‐2 and nar‐3 both lack the ability to produce nitrate reductase. However, nar‐2 grows and nar‐3 does not grow when hypoxanthine is the sole nitrogen source. The specific activity of the next enzyme, in the pathway, nitrite reductase is increased in nar‐3 when compared to wild‐type, nar‐1 and nar‐2 .