Fig. 5From: Strong spurious transcription likely contributes to DNA insert bias in typical metagenomic clone librariesHistogram of sigma factor consensus sequence content in crude extract, size-selected, and cosmid library samples. Bars indicate the number of consensus sequences in each sample, for select E. coli sigma factors and the Bacteroides primary sigma factor, normalized to the amount of sequence data for that sample. Consensus content is depicted on a log scaleBack to article page