The disclosure provides methods of characterizing a sample of oligonucleotides of interest using liquid chromatography and mass spectrometry.

The disclosure provides methods of characterizing a sample of oligonucleotides of interest using liquid chromatography and mass spectrometry.

This application provides methods to quantitate drug incorporation into DNA and of simultaneously measuring DNA methylation levels. Drugs include nucleoside analog DNA methyltransferase inhibitors.

This application provides methods to quantitate drug incorporation into DNA and of simultaneously measuring DNA methylation levels. Drugs include nucleoside analog DNA methyltransferase inhibitors.

Methods of purifying targeted oligonucleotides within a reaction mixture using hydrophilic interaction liquid chromatography (HILIC) is disclosed. One of the methods in accordance with the present disclosure includes screening the targeted oligonucleotides within the reaction mixture with HILIC to create an initial reaction mixture profile; determining an elution percentage for the targeted oligonucleotides; focusing a HILIC elution gradient around the elution percentage of the targeted oligonucleotides; and purifying the targeted oligonucleotides with HILIC using the focused elution gradient at room temperature. Some embodiments can utilize mass triggering for fraction collection of the targeted oligonucleotides. Some embodiments can utilize UV triggering when the mass falls outside of the mass range of the MS detector.

Methods of purifying targeted oligonucleotides within a reaction mixture using hydrophilic interaction liquid chromatography (HILIC) is disclosed. One of the methods in accordance with the present disclosure includes screening the targeted oligonucleotides within the reaction mixture with HILIC to create an initial reaction mixture profile; determining an elution percentage for the targeted oligonucleotides; focusing a HILIC elution gradient around the elution percentage of the targeted oligonucleotides; and purifying the targeted oligonucleotides with HILIC using the focused elution gradient at room temperature. Some embodiments can utilize mass triggering for fraction collection of the targeted oligonucleotides. Some embodiments can utilize UV triggering when the mass falls outside of the mass range of the MS detector.

The present invention discloses genes and SNP markers significantly associated with lint percentage trait in cotton, and use thereof. The genes significantly associated with the lint percentage trait in cotton are genes Gh_D05G1124, Gh_D05G0313, and GhWAKL3. In the present invention, a CottonSNP63K gene array is used for genotyping, and genome re-sequencing data are analyzed to identify SNP markers significantly associated with the lint percentage trait in cotton. Moreover, the present invention also discloses use of the genes and SNP markers, which are significantly associated with the lint percentage trait in cotton, in cotton germplasm identification, breeding, or genetic diversity analysis.

Methods to qualitatively and quantitatively determine mRNA capping, and to determine 5′ capping efficiency and 5′ cap identity in RNA samples, all without the need for radiolabels, by using tagged probes that are complementary to the 5′ end of target RNA and RNAse H to cleave the 5′ end of RNA, then using LC-MS to determine the 5′ RNA products.

Methods to qualitatively and quantitatively determine mRNA capping, and to determine 5′ capping efficiency and 5′ cap identity in RNA samples, all without the need for radiolabels, by using tagged probes that are complementary to the 5′ end of target RNA and RNAse H to cleave the 5′ end of RNA, then using LC-MS to determine the 5′ RNA products.

An atlas of intestinal epithelial cells, intestinal epithelial stem cells and intestinal immune cells identifies new cell populations, markers, networks, and responses to stimuli. Intestinal epithelial cell sub-types are also found in the trachea. Accordingly, disclosed are methods of modulating epithelial cell differentiation, maintenance and/or function, related methods for the treatment of disease, including IBD and asthma. Also disclosed are methods and kits for identifying cell types, their differentiation, homeostasis and activation.