SVETKA, a program for analysis of different alignments . Back to the help page . ... Such a feature can look like " Leucine in the position 362 of the alignment of the entire family " and can, in many cases, be a "decision rule" to distinguish sequences from two sides of a tree branch. ... Comparing the alignment with an input tree (the tree may be entered by the user or reconstructed with the WPGMA algorithm), the program detects supporting positions of the alignment for every branch the tree. ...