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J Bacteriol. 1975 April; 122(1): 54-58

Characterization of Neurospora crassa mutants deficient in glucosephosphate isomerase.

ABSTRACT

Two independent mutants of Neurospora crassa lacking glucosphosphate isomerase activity (gpi) were isolated. These mutants were obtained as double mutants containing the pp or T9 mutation in addition to the gpi mutation located on linkage group IV; the pp mutation caused the inability to form protoperithecium and the loss of ascospore germination, and the T9 mutation caused the alteration in glucoamylase and several growth characteristics. The gpi mutants did not grow on fructose but grew on glucose or sucrose. Growth of these mutants on glucose was stimulated by addition of fructose. The gpi mutants showed restricted colonial growth on agar media containing glucose in contrast to the normal filamentous growth of the wild-type stain.

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