Alternative Trees. Two different trees (with bootstrap support values based on 100 replicates) constructed from a single gene family  with different protein models using Phyml v2.4.4 . Tree (a) was produced using the MtREV matrix  and Tree (b) was produced using the WAG matrix .
Keane et al. BMC Evolutionary Biology 2006 6:29 doi:10.1186/1471-2148-6-29