Disclosed herein, inter alia, are compounds, compositions, and methods of use thereof for sequencing a nucleic acid.

Disclosed herein, inter alia, are compounds, compositions, and methods of use thereof for sequencing a nucleic acid.

A method is presented that enables the spatial mapping of nucleic acids of tissue samples with high resolution and without sacrificing the degree of multiplexing that is available from next-generation sequencing. The method is based on the application of patterns of barcoded oligonucleotides probes onto predefined locations in a region of interest in a tissue sample. Every nucleic acid analyzed can be allocated to a certain position inside the sample based on the barcode. Various printing technologies can be used and different ways of patterning can be employed, like a regular array with a certain pitch or alternatively an object-based patterning with defined regions of interest without shape constraints.

Polynucleotide sequencing methods include incubating unlabeled nucleotides with a cluster of template polynucleotide strands having the same sequence when the identity of the previously added labeled nucleotide is being detected. The detection step provides time for the addition of the unlabeled nucleotides to be incorporated into the copy strands in which the previously added labeled nucleotide did not get incorporated. Thus, at the end of the detection step, all or most of the copy strands will be in phase and ready to incorporate the appropriate labeled nucleotide in the subsequence incorporate step.

Embodiments of the present invention provide for improving the quality of cell-free DNA for analysis. Cell-free DNA may include DNA with defects that do not allow for analysis of those DNA with techniques such as sequencing and targeted capture enrichment. These defects may be defects within the strands of the DNA and not present at the ends of the DNA. Embodiments of the present invention repair these intrastrand defects in cell-free DNA. The repair of the defects in cell-free DNA may then allow for these repaired cell-free DNA to be analyzed by techniques, including sequencing and targeted capture enrichment.

Embodiments of the present invention provide for improving the quality of cell-free DNA for analysis. Cell-free DNA may include DNA with defects that do not allow for analysis of those DNA with techniques such as sequencing and targeted capture enrichment. These defects may be defects within the strands of the DNA and not present at the ends of the DNA. Embodiments of the present invention repair these intrastrand defects in cell-free DNA. The repair of the defects in cell-free DNA may then allow for these repaired cell-free DNA to be analyzed by techniques, including sequencing and targeted capture enrichment.

The present disclosure provides improved nucleic acid sequencing-by-synthesis (SBS) methods, related kits and reagents, and systems for performing such methods using such kits and reagents.

Methods and compositions for determining and/or monitoring the immune state of an individual are provided.

Polynucleotide sequencing methods include incubating unlabeled nucleotides with a cluster of template polynucleotide strands having the same sequence when the identity of the previously added labeled nucleotide is being detected. The detection step provides time for the addition of the unlabeled nucleotides to be incorporated into the copy strands in which the previously added labeled nucleotide did not get incorporated. Thus, at the end of the detection step, all or most of the copy strands will be in phase and ready to incorporate the appropriate labeled nucleotide in the subsequence incorporate step.

The quality of cell-free DNA for analysis is improved by techniques described herein. Cell-free DNA may include DNA with defects that do not allow for analysis of those DNA with techniques such as sequencing and targeted capture enrichment. These defects may be defects within the strands of the DNA and not present at the ends of the DNA. These intrastrand defects in cell-free DNA can be repaired. The repair of the defects in cell-free DNA may then allow for these repaired cell-free DNA to be analyzed by techniques, including sequencing and targeted capture enrichment.