Fig. 5
![Fig. 5](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13068-016-0534-x/MediaObjects/13068_2016_534_Fig5_HTML.gif)
a Heatmap reflecting the expression of cellulolytic GH families in the bacterial bins generated from the biogas fermenter metagenome. Expression strength is shown as square root of the rpkm value. Bin-IDs for selected bins affiliated with the Bacteroidetes and the Firmicutes are indicated. All other bin-IDs are given in Additional file 9 with a continuous labeling. b Physical map of three putative cellulolytic PULs. The PULs were identified on three contigs assigned to the bacteroidetal bin 36. TBDRÂ =Â TonB-dependent receptor. An asterisk indicates GH families with cellulase (GH5, GH9) or cellobiase (GH94) activity