Physical mapping of chromosome 3p25-p26 by Fluorescence in situ hybridisation (FISH) (CAT#: STEM-MB-1219-WXH)

Name: Physical mapping of chromosome 3p25-p26 by Fluorescence in situ hybridisation (FISH)
SKU: STEM-MB-1219-WXH
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Introduction

Distal 3p deletion syndrome is a rare contiguous-gene disorder involving deletion of chromosome 3p25-p26. Characteristic features of distal 3p- syndrome include low birth weight, microcephaly, trigonocephaly, hypotonia, psychomotor and growth retardation, ptosis, telecanthus, downslanting palpebral fissures and microagnathia.

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Principle Applications Procedure Materials

Principle

FISH uses fluorescent probes with complementary base sequences to locate the presence or absence of specific portions of DNA on chromosomes. The probe and target DNA must be denatured with heat or chemicals to break hydrogen bonds in the DNA and to allow hybridisation to occur once the two samples are mixed. The fluorescent probes form new hydrogen bonds with their complementary base pairs on the DNA, and these can then be detected via microscopy.

Applications

Detect and localize the presence or absence of specific DNA sequences on chromosomes.
Detect and localize specific RNA targets (mRNA, lncRNA and miRNA) in cells, circulating tumor cells, and tissue samples.

Procedure

1. Sample preparation
2. Co-denaturation and hybridization
3. Probe detection
4. Wash off of unbound probe
5. Analysis by flow cytometer/fluorescence microscopy