FIG. 1.

Cluster of the composite data set and ERIC and (GTG)₅ fingerprints of three different lysates made on three different days (t1, t2, and t3) and run in three different PCR runs in the same thermal cycler. The similarities between the fingerprints were calculated using the Pearson correlation (optimization, 1%; position tolerance, 1%), and the fingerprints were grouped according to their similaritiesby use of the UPGMA algorithm. The vertical grey line shows the delineation level of 92.5%. The last column shows the strain numbers. The grey bar at the top of the figure shows the part (79.3% to 84.3%) of the ERIC fingerprints that is not taken into account to calculate the cluster, as explained in the text.