Figure 3

Unrooted phenetic tree based on nucleotide DIRS1 -like sequences identified in hydrothermal organisms. The tree was constructed using Neighbor Joining method and pairwise deletion of gaps option included in MEGA4.1 software. Alvi1-5 families are originated from hydrothermal shrimps and Ymur1-3 elements were identified in Munidopsis recta. Support for individual clades was evaluated using non-parametric bootstrapping obtained from 1000 bootstrap replicates. Only bootstrap nodes value over 70% are indicated. Distances were calculated with Tamura 3 parameter model plus gamma distribution's correction for nucleotides.