Clones showing the same band positions in the gel indicate the same melting behaviour. They were pooled to one group because of possible same sequence. Clones that show different migration behaviour in the gel, were sequenced and phylogenetically classified (Kuffner et al.,2004; Schabereitner-Gurtner et al., 2001). The length of the clone inserts were 601–642 bp for the eubacteria and 370–374 bp for enterobacteriaceae.