Determination of Transcription Start Sites (TSS) in Azotobacter vinelandii grown with iron, vanadium or molybdenum for 6 hours after nitrogen step-down. Determination of Transcription Start Sites (TSS) in Azotobacter vinelandii grown with iron, vanadium or molybdenum for 6 hours after nitrogen step-down

This experiment was to determine genome wide qualitative and quantitative differences in transcription starts under conditions of availability of iron or vanadium or molybdenum which act as co-factors for different nitrogenase isoenzymes. In response to availability of the co-factors transcription initiation is mediated by three paralogs of vanadium nitrogenase activator VnfA1, VnfA2 and, VnfA3. ChIP-Seq data for VnfA1 and VnfA3 will be submitted separately.