Like cancer testing, earlier detection of the mutation can prevent the disease, improve survival rates and reduce medical costs.
Two conclusions can be derived from these experiments: (i) once established as dominant in a viral population, a mutagen-resistant mutation can prevent viral extinction by high doses of the same mutagenic agent; (ii) a wild type virus need not select a mutagen-resistance mutation, when replicating under high concentrations of the mutagen, and, therefore, extinction may occur.
At the molecular level, such mutations can prevent an antibiotic entering the bacteria cell at all, altering the target molecules so that they don't bind to the antibiotic anymore, or enhancing the efficiency of efflux mechanisms within the bacteria which allow it to simply pump a drug back out again.
The drug expert David Cox explains what happens at the molecular level: Such mutations can prevent an antibiotic entering the bacteria cell at all, altering the target molecules so that they don't bind to the antibiotic anymore, or enhancing the efficiency of efflux mechanisms within the bacteria which allow it to simply pump a drug back out again.
Studies in E. coli have shown that different Crp mutations can prevent transcription activation at a numbers of Crp-dependent promoters and suggested that Crp can use different contacts and/or conformations during transcription at promoters with different architectures [ 19, 20].
Detailed analysis using previously described mutations within the C-terminus identified a single point mutation, R90K, which can prevent the IL-12 blockade.
Cancer-associated mutations in BRCA1 can prevent nuclear localisation of BRCA1 and its contribution to nuclear DNA repair foci formation in response to DNA damage (for example, by ionising radiation [IR]) [ 6, 7].
Target dsDNA lacking a PAM is bound weakly by eCascade [ 76, 77] and is resistant to cleavage [ 78], consistent with the observation that mutations in the PAM can prevent interference [ 15, 79].
A DNA repair process by which cells can prevent unwanted mutations by removing UV-induced DNA damage.
For example, it has been shown that the proofreading and repair function for DNA polymerase epsilon is efficient for short homopolymer tracts, but that only the mismatch repair system can prevent frameshift mutations in tracts of length 8 nucleotides or greater [ 8].
The Pig-a (phosphatidylinositol glycan complementation group A) gene product is involved in the first step of GPI anchor biosynthesis, and since it is the only X-linked gene involved in the GPI anchor synthesis pathway, it is generally accepted that a single mutation at the Pig-a locus can prevent the anchoring of GPI anchored proteins (i.e., CD24 in mouse, or CD59 in rat).
