The invention is directed to modified oligonucleotide compositions and methods for selectively reducing unwanted nucleic acid contaminants and enriching for desired nucleic acid targets from complex genomic nucleic acid mixtures for sequencing applications. The modified oligonucleotide compositions include one or more modified groups that increase the T.sub.m of the resultant oligonucleotide composition.

The present invention generally relates to a combination of molecular barcoding and emulsion-based microfluidics to isolate, lyse, barcode, and prepare nucleic acids from individual cells in a high-throughput manner.

The present invention generally relates to a combination of molecular barcoding and emulsion-based microfluidics to isolate, lyse, barcode, and prepare nucleic acids from individual cells in a high-throughput manner.

The present invention provides, inter alia, methods and compositions for imaging, at high spatial resolution, targets of interest.

The present invention provides, inter alia, methods and compositions for imaging, at high spatial resolution, targets of interest.

A DNA construct comprises multiple units sequentially attached one to the other, wherein a unit comprises: a segment; an index attached to one end of the segment; an identifier attached to another end of the segment; an introducer attached to a 5′-end of either the index or the identifier; and a closure attached to a 5′-end of a remaining either identifier or index. A method for preparing the DNA construct and a method for analyzing a sequence of the DNA construct, as well as various embodiments thereof, are disclosed herein.

A DNA construct comprises multiple units sequentially attached one to the other, wherein a unit comprises: a segment; an index attached to one end of the segment; an identifier attached to another end of the segment; an introducer attached to a 5′-end of either the index or the identifier; and a closure attached to a 5′-end of a remaining either identifier or index. A method for preparing the DNA construct and a method for analyzing a sequence of the DNA construct, as well as various embodiments thereof, are disclosed herein.

Provided herein are methods for enhanced specificity of multiplexed measurements. Methods provided herein include immunoassay reactions and/or measuring protein-protein interactions with direct sequencing readouts of DNA barcodes.

Provided herein are methods for enhanced specificity of multiplexed measurements. Methods provided herein include immunoassay reactions and/or measuring protein-protein interactions with direct sequencing readouts of DNA barcodes.

Provided herein is a method for mapping rolling circle amplification (RCA) products that contain unique identifier sequences. The method generally involves (a) producing a complex comprising population of grid oligonucleotide molecules and a population of RCA products that each have a unique RCA product identifier sequence, wherein the grid oligonucleotides are hybridized directly or indirectly via a splint to complementary sites in the RCA products; (b) extending the grid oligonucleotide molecules that are hybridized to two RCA products to add the complements of the unique RCA product identifier sequences from the two RCA products to the grid oligonucleotide molecules; (c) sequencing the extended grid oligonucleotides; (d) analyzing the sequences to identify which pairs of unique RCA product identifier sequence complements have been added onto the grid oligonucleotides; and (e) making one or more physical maps of the immobilized RCA products using the pairs of sequences identified in (d).