Mutagenic Primers
Mutagenic Primers - Related Videos
01:25
Mutagenicity and Carcinogenicity
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2023
Mutagenicity and carcinogenicity refer to the ability of drugs to cause genetic defects and induce cancer, respectively. The International Agency for Research on Cancer (IARC) classifies agents into four groups based on their carcinogenic potential. Group 1 agents are known human carcinogens; group 2A agents are probably carcinogenic to humans; group 3 agents lack data to support their role in carcinogenesis; and group 4 includes agents for which data support that they are not likely to be...
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.
15:28
Primer Extension Capture: Targeted Sequence Retrieval from Heavily Degraded DNA Sources
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Cited by 41 •
2009
We present a method of targeted ancient DNA sequence retrieval, which we used to reconstruct the complete mitochondrial genomes of five Neandertal individuals. Comparison of these sequences with present day humans suggests that Neandertals had a long term low effective population size.
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.
06:36
A Field Primer for Monitoring Benthic Ecosystems Using Structure-From-Motion Photogrammetry
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Cited by 14 •
2021
We provide a detailed protocol for conducting underwater structure-from-motion photogrammetry surveys to generate 3D models and orthomosaics.
FAQs
The altered base is carried by the primer rather than copied from an unchanged template at that position. After the primer anneals to its complementary target region, the mismatch remains part of the primer-template arrangement, and DNA polymerase extends from the primer. Successive PCR cycles then copy and enrich molecules that contain the planned sequence change.
Annealing provides the sequence-specific anchor that positions the intentional mismatch at the target site. Complementarity elsewhere allows the primer to bind the gene template, while the altered bases specify the variant copied during extension. This balance directs PCR toward a defined change rather than an unspecified sequence alteration.
The location of the engineered change determines the biological question. In a coding region, the altered sequence can be used to examine effects on protein structure or activity. In a regulatory sequence, it can help test how sequence variation influences gene control. Primer design therefore connects a molecular change with functional interpretation.
A PCR-based workflow begins with a target template and a synthetic primer carrying the intended sequence change. The primer anneals to its complementary region, DNA polymerase extends it, and repeated amplification produces more copies of the altered product. The enriched material can then support investigation of the selected genetic variant.
They are useful when researchers need to test a specific genetic change in a target gene. Altering a coding region enables examination of consequences for protein structure or activity, making the approach relevant to molecular biology, biotechnology, and functional genomics. The defined change provides a focused basis for linking sequence variation with function.
A primer can introduce a disease-associated variant into a target gene so its functional consequences can be examined experimentally. The same strategy supports broader functional-genomics studies by creating controlled sequence differences and observing how they affect biological function. This connects a defined genetic alteration with experimentally assessable biological outcomes.