Figure 4From: Spatial patterns of transcriptional activity in the chromosome of Escherichia coliTwo-dimensional (2D) wavelet power spectrum of transcriptional activity in the vicinity of the origin of replication. The wavelet power spectrum from 20 to 200 kb of transcriptional activity of wild-type E. coli (a) untreated and (b) treated with norfloxacin for 30 min. The 2D wavelet spectrum was calculated as in Figure 3.Back to article page