Description of five mutants of the cyanobacterium Anabaena sp strain PCC 7120 affected in heterocyst differentiation and identification of the transposon-tagged genes.

Abstract excerpt

When growing on N(2) as sole nitrogen source, the filamentous cyanobacterium Anabaena sp. PCC 7120 forms N(2) fixing heterocysts in a semi-regular pattern. To identify genes involved in heterocyst differentiation we characterised five transposon-generated mutants that were not able to form mature heterocysts. After recovering the transposon together with the flanking region of the Anabaena chromosome the affected...

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