Gene Specific Primers
Gene Specific Primers - Related Videos
10:17
Laboratory Protocol for Genetic Gut Content Analyses of Aquatic Macroinvertebrates Using Group-specific rDNA Primers
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Cited by 7 •
2017
Most common gut content analyses of macroinvertebrates are visual. Requiring intense knowledge about morphological diversity of prey organisms, they miss soft bodied prey and, due to strong comminution of prey, are nearly impossible for some organisms, including amphipods. We provide detailed, novel genetic approaches for macroinvertebrate prey identification in the diet of amphipods.
01:58
Cell Specific Gene Expression
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2020
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
01:58
Cell Specific Gene Expression
0 Views •
2023
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
10:17
An Allele-specific Gene Expression Assay to Test the Functional Basis of Genetic Associations
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Cited by 2 •
2010
Genetic associations often remain unexplained at a functional level. This method aims to assess the effect of phenotype-associated genetic markers on gene expression by analyzing cells heterozygous for transcribed SNPs. The technology allows accurate measurement by MALDI-TOF mass spectrometry to quantify allele-specific primer extension products.
11:14
Primer-Free Aptamer Selection Using A Random DNA Library
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Cited by 20 •
2010
SELEX protocols comprise multiple rounds of selection, each of which require regeneration of bound ligands, which in turn require fixed primer sequences flanking the random library regions. These fixed primer sequences can interfere with the selection process (false positives and negatives). Here we present a primer-free protocol.
FAQs
Annealing conditions help determine whether each primer binds its intended complementary sequence rather than unrelated DNA. When the conditions are appropriate for the primer sequence, amplification can be more specific and efficient. If conditions are poorly matched, the reaction may produce less useful target DNA, making downstream analysis such as mutation detection, genotyping, or sequencing more difficult.
The forward and reverse primers bind complementary strands at defined positions surrounding the region of interest. Each primer supplies a starting point for DNA polymerase, allowing extension across the selected interval from opposite directions. Together, they establish the boundaries of the amplified product and support repeated copying of the same gene region during PCR.
Primer sequence, length, and annealing conditions are the main characteristics identified as influencing amplification specificity and efficiency. The sequence determines which gene region is selected, while primer length contributes to how that oligonucleotide interacts with its complementary target. Considering these features together helps produce an amplified region suitable for focused genetic analysis.
Their selected binding sequences direct PCR toward a defined gene or gene region instead of treating all available DNA as the analytical target. This focused design makes the resulting amplified material useful for examining particular genetic variation, detecting mutations, or investigating the function and expression of a selected gene.
A researcher first selects primer sequences within or near the gene region of interest, then uses forward and reverse primers under defined annealing conditions during PCR. DNA polymerase extends the bound primers, and repeated amplification produces many copies of the selected region. Those copies can then support genotyping, mutation detection, cloning, or sequencing.
They support gene expression analysis when the investigation uses reverse transcription PCR, a PCR-based approach included in the overview. In this context, primers focus amplification on a selected gene so that researchers can examine that gene’s expression rather than analyzing genetic material without a defined target. Their specificity connects the assay to the gene under study.
Primers can be designed around or within a target gene region so PCR generates copies suitable for focused examination. Researchers can then use the amplified material to investigate genetic variation or identify mutations associated with that region. The same targeted strategy supports genotyping, where analysis is directed toward the selected gene rather than the genome as a whole.
Targeted amplification supplies many copies of a chosen gene region for subsequent cloning or sequencing. By defining which portion of the gene is copied, the primers help focus these applications on the sequence relevant to the biological question. This approach can also connect sequence-level results with studies of genetic variation or gene function.