brejnev/SDTv1.2

Sequence Demarcation Tool Version 1.2 (SDTv1.2) is a free and easy to use program that allows classification of virus sequences based on sequence pairwise identity. It takes as input a FASTA file of aligned or unaligned DNA or protein sequences and aligns every unique pair of sequences, calculates pairwise similarity scores, and displays a colour coded matrix of these scores. It also produces both a plot of these pairwise identity scores and text files containing analysis results. The identity scores are calculated as 1-(M/N) where M is the number of mismatching nucleotides and N the total number of positions along the alignment at which neither sequence has a gap character.