This work aimed to create software capable of presenting nucleotide sequences in a form convenient for recognition and comparison by humans. For this, the method of DNA walk by vectors of different lengths in the directions North-South-West-East was chosen. Each nucleotide has its direction. It is shown that diagrams of the triander type, represented by three branches, each corresponding to the position of a nucleotide in a codon, are similar for the same genes of different biological species and may differ for different genes. Comparing the diagrams allows one to notice even minor differences between gene sequences for different species of the same genus. The sources and binaries for the Windows operating system of Triander software were placed at https://icbge.org.ua/eng/Triander. The Web application jsTriander is located at https://triander.icbge.org.ua and can be used both online and offline.
Keywords: DNA walk diagram, sequence analysis, triander, software
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