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Scientific News
Liquid Biopsies: Miracle Diagnostic or Next New Fad?
Thanks to the development of highly specific gene-amplification and sequencing technologies liquid biopsies access more biomarkers relevant to more cancers than ever before.
Discovered Through ‘Big Data’ Analysis
Researchers at the SBP have identified over 100 new genetic regions that affect the immune response to cancer.
New Therapeutic Targets For Small Cell Lung Cancer Identified
Researchers at UTSW Medical Center have identified a protein termed ASCL1 that is essential to the development of small cell lung cancer and that, when deleted in the lungs of mice, prevents the cancer from forming.
Deciphering Inactive X Chromosomes
Untangling the Barr body of inactive X chromosomes valuable for understanding chromosome structure and gene expression.
Micro Disease-Detecting Senor Created
Researchers at McMaster University have created a microscopic disease-detecting sensor that can turn on to detect trace amounts of substances.
Liquid Biopsies Treating Ovarian Cancer
Researchers have discovered a promising monitor and treat recurrence of ovarian cancer. Detecting cancer long before tumours reappear.
Uncovering a New Principle in Chemotherapy Resistance in Breast Cancer
The NIH study has revealed an entirely unexpected process for acquiring drug resistance that bypasses the need to re-establish DNA damage repair in breast cancers that have mutant BRCA1 or BRCA2 genes.
Understanding Treatment Resistant Melanoma
Researchers have determined how advanced melanoma becomes resistant; a development toward developing treatments.
Investigating ‘Black Box’ of Human Genetics
Investigations into inactive X chromosomes have shown unusual DNA repeat elements are essential for maintaining 3D structure.
Liquid Biopsies: DNA Size Matters
Study finds circulating tumour DNA can be distinguished from healthy DNA through fragment size identification.
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Sequence-Specific DNA Assay
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Molecular Devices

Measurement of specific DNA sequences can be achieved using the Threshold® System. Biotinylated and fluoresceinated oligonucleotide probes specific to the target sequence to be measured are used with the Immuno Ligand Assay (ILA) kit components. The probes are chosen so that they both anneal to the same strand of the target, adjacent to each other. DNA samples to be measured are digested with an appropriate restriction enzyme to liberate the target sequence on a small DNA fragment. The digested DNA is denatured in the presence of an excess of the biotinylated and fluoresceinated probes. The probes and denatured target are allowed to anneal, generating probe-target hybrids. These probe-target hybrids are captured on the biotinylated Threshold sticks using the ILA capture reagent (streptavidin) which binds to the biotinylated probe. The captured probe-target hybrids are then detected and quantitated using the ILA enzyme reagent (antifluorescein- urease conjugate) which binds to the fluoresceinated probe. This application note is intended as a guide and does not represent a validation of this assay, nor necessarily the optimal performance parameters for all probe and target DNA combinations.


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