[Effectiveness of sequencing using stacking hybridization on oligonucleotide matrices with varying length of immobilized oligonucleotides].

The opportunity of enhancing the sequencing efficiency by applying continuous stacking hybridization is considered. The approach is based on the increase of duplex length by continuous stacking hybridization of oligonucleotides added to solution (l-oligonucleotides) to oligonucleotides immobilized on matrix (L-oligonucleotides). An analysis of reconstruction efficiency for sequenced fragments up to length of 30000 nucleotides was made. Various combinations of L- and l-oligonucleotide length were considered. The results obtained enable one to evaluate the potentialities of the proposed method for various nucleotide matrices and the complexity of experiment. Use of continuous stacking hybridization permits a considerable increase of the length of sequenced DNA fragments. We offer the approach for resolving ambiguities in branching points, which occur because of long repeats. It is based on continuous stacking hybridization of several l-oligonucleotides which form a "chain" stabilized by mutual stacking interaction.