CODON RESTRICTION ANALYSIS TOOL(CRAT) provides users with an interface to study and analyze the effect of codons on adaptive evolution through phylogenetic analysis of molecular sequences under restricted codons.

Interface allow users to reconstruct phylogentic trees from molecular sequences in fasta format. Users can save the trees in various formats.

In tree comparison tool, users can compare two or more phylogenetic trees at a time. For comparison, you need to provide atleast two tree in newick format as an input; first tree as a reference tree and second tree as a query. User can give multiple query trees as input and compare them against reference tree. Tree in Newick format can be generated using Tree building tool.