FIG. 2.
Cluster analysis of actinobacterial 16S rRNA gene and type II PKS gene TRFLP data. The dendrograms are neighbor-joining dendrograms obtained from a similarity matrix (Ps) by using a sliding search window of ±0.5 bp. A distance of 0.1 indicates a 10% difference between samples. Bootstrap values were obtained by binning the data and calculating a consensus tree using 1,000 bootstrap replicates. With the exception of the central node in panel C, only the bootstrap values that are >65% are shown. The arrows indicate bootstrap values for specific nodes. 
, soil samples collected in Uzbekistan; ▪, soil samples collected in the Greenwood Forest Wildlife Management Area;, soil samples collected in Picatinny Arsenal. (A) Actinobacterial 16S rRNA gene TRFLP data. (B) Type II PKS gene TRFLP data. (C) Actinobacterial 16S rRNA gene TRFLP data when only the peaks that were found in more 10% of all samples were considered. A bootstrap value is shown for the central node, which divides New Jersey samples from Central Asian samples, even though the value is less than 65%. (D) Actinobacterial 16S rRNA gene TRFLP data when only the peaks that were found in less than 10% of all samples were considered.