Journal
JOURNAL OF BACTERIOLOGY
Volume 187, Issue 3, Pages 1114-1123Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/JB.187.3.1114-1123.2005
Keywords
-
Categories
Ask authors/readers for more resources
As demonstrated with alr2835 (hepA) and alr2834 (hepC) mutants, heterocysts of Anabaena sp. strain PCC 7120, a filamentous cyanobacterium, must have an envelope polysaccharide layer (the Hep(+) phenotype) to fix dinitrogen in an oxygen-containing milieu (the Fox(+) phenotype). Transpositions presumptively responsible for a Fox(-) phenotype were localized in open reading frames (ORFs) near hepA and hepC. A mutation in each of nine of these ORFs was complemented by a clone bearing only that single, intact ORF. Heterocysts of the nine mutants were found to lack an envelope polysaccharide layer. Complementation of mutations in alr2832 and alr2840 may have resulted from recombination. However, alr2825, alr2827, alr2831, alr2833, alr2837, air2839, and alr2841, like hepA and hepC, are required for a Hep(+) Fox(+) phenotype.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available