Figure 4
From: Contamination of human DNA samples with mouse DNA can lead to false detection of XMRV-like sequences
Neighbor Joining Tree of gag fragments. A neighbor-joining tree was constructed using the 382 bp gag fragments detected from the PBMC DNA of 17 healthy controls and 2 CFS patients, along with various endogenous and exogenous MLV sequences. Identical sequences were collapsed into individual clusters, where a representative member is shown followed by "+(N)", where N is the total number of sequences in that cluster. Distances were calculated based on the absolute number of base substitutions; all sites containing gaps were ignored. Note the extensive variation of sequences detected in our samples (TH, shown in red), which cluster with known Xmv (purple), Pmv (blue), Mpmv (green) and XMRV (yellow) sequences.