Single nucleotide detection method and associated probes

    公开(公告)号:US11920192B2

    公开(公告)日:2024-03-05

    申请号:US16613593

    申请日:2018-05-15

    IPC分类号: C12Q1/6869 C12Q1/6823

    摘要: A method of sequencing a nucleic acid comprising (1) generating a stream of single nucleoside triphosphates by progressive enzymatic digestion of the nucleic acid; (2) producing at least one oligonucleotide used probe by reacting, in the presence of a polymerase, at least one of the single nucleoside triphosphates with a corresponding biological probe comprising (a) a first single-stranded oligonucleotide including an exonuclease blocking-site, a restriction endonuclease recognition-site located on the 5′ side of the blocking-site and including a single nucleotide capture-site e, and at least one fluorophore region and (b) a second and optionally a third single-stranded oligonucleotide each separate from the first oligonucleotide; (3) cleaving the first oligonucleotide strand of the used probe at the recognition-site with a restriction endonuclease; (4) digesting the first oligonucleotide component with an enzyme to yield fluorophores in a detectable state and (5) detecting the fluorophores released in step (4).

    METHOD FOR ELIMINATING NON-NATURAL SEQUENCE PORTIONS FROM FASTQ SEQUENCE DATA

    公开(公告)号:US20240068038A1

    公开(公告)日:2024-02-29

    申请号:US18234598

    申请日:2023-08-16

    摘要: The present invention relates to a method for eliminating non-natural nucleic acid sequence portions from paired-end reads of nucleic acid fragments comprising the steps of (a) providing paired-end reads of nucleic acid fragments, wherein one of the two paired-end reads that constitute a read pair of a nucleic acid fragment is converted into its reverse complement form; (b) aligning the two paired-end reads of the read pair of step (a) with each other; (c) identifying overlapping sequence regions in the aligned paired-end reads; (d) identifying a unique molecular identifier (UMI) sequence as non-natural nucleic acid sequence in the aligned paired-end reads; (e) optionally storing said identified UMI sequence; (f) deleting said identified UMI sequence, if present, at the 5′ end of each paired-end read; and (g) deleting said identified UMI sequence, if present, at the 3′ end of each paired-end read.

    BIOMARKER FOR PREDICTING AGE IN DAYS OF PIGS, AND PREDICTION METHOD

    公开(公告)号:US20240068036A1

    公开(公告)日:2024-02-29

    申请号:US18502378

    申请日:2023-11-06

    IPC分类号: C12Q1/6883

    CPC分类号: C12Q1/6883 C12Q1/6869

    摘要: Disclosed are biomarkers and a prediction method for predicting age in days in pigs. The biomarkers for predicting age in days of pigs include one or more CpG sites with different methylation levels, and the different methylation levels of the CpG sites correspond to different ages in days of pigs. An Elastic Net linear regression model is constructed by using the methylation levels of the CpG sites and the weights corresponding to each CpG site, thereby predicting age in days of pigs to be tested. The above prediction method has high accuracy, and is accurate and reliable in detecting age in days of pigs, which fills the gap in the age prediction model of pigs based on DNA methylation, and provides an ideal model for investigating important scientific issues such as development and aging of human and animals.

    T4 DNA Ligase Variants with Increased Resistance to Salt

    公开(公告)号:US20240067951A1

    公开(公告)日:2024-02-29

    申请号:US18195702

    申请日:2023-05-10

    IPC分类号: C12N9/00 C12Q1/6869

    摘要: A number of T4 DNA ligase mutants exhibiting enhanced ligation activity in the presence of high salt concentrations compared to the wild-type ligase were engineered, characterized, and selected via gel electrophoresis of ligation products from a standard ligation assay. Ligase catalyzes the formation of phosphodiester bonds between the 5′ and 3′ ends of complementary cohesive ends or blunt ends of duplex DNA, a process that is vital to numerous molecular biology processes including cloning and sequencing.