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Mutations Associated with Second-line Tuberculosis Drug
Mutations Associated with Second-line Tuberculosis Drug

... • The inclusion of the gyrB gene may improve the sensitivity of the MTBDRsl assay for the detection of OFX resistance • The inclusion of eis gene (C-14T), as a marker of Km resistance, would improve the sensitivity of rapid detection assays for Km resistance • Additional eis mutations increased sens ...
Genes: Definition and Structure
Genes: Definition and Structure

... ribosomes, transfer RNAs (tRNAs), and a variety of protein enzymes and ‘factors’ – uses the mRNA template to direct the synthesis of a protein, a process called translation. The DNA of the chromosome contains many genes lined up one after another, but mRNAs generally contain the message for only one ...
Biotechnology
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... In the laboratory, scientists remove the gene for insulin from human chromosomes.They insert the gene into the DNA of bacteria. This causes the bacteria to produce human insulin. The insulin is used to treat diabetes in humans. Which of these describes this process? A. ...
A new monoclonal antibody (CAL2) detects
A new monoclonal antibody (CAL2) detects

... of mutations in JAK2, CALRETICULIN (CALR) and MPL genes has greatly facilitated this differential diagnosis. Polycythaemia vera is associated with JAK2 mutations (JAK2 V617F and JAK2 exon 12 mutations) in virtually all cases. In contrast, JAK2 mutations are present in essential thrombocythaemia (ET) ...
Bio07_TR__U04_CH12.QXD
Bio07_TR__U04_CH12.QXD

... are turned on and off by a section of a chromosome called an operon. An operon is a group of genes that work together. Two sequences of DNA in the operon that control when genes are turned on and off are the operator and the promoter. When the cell needs a certain protein, RNA polymerase attaches to ...
Hot Seat - Protein Synthesis
Hot Seat - Protein Synthesis

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13 Transcription and translation

... - adds amino acids to polypeptide chain once it reads a codon Must start reading in correct spot on mRNA
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cDNA cloning, expression and chromosomal localization of the

... sequence of the functional gene. If a rate of ~2 x 10-9 per nucleotide per year is taken as a model for spontaneous mutation in primates and assuming that the nucleotide differences were accumulated by the pseudogene while the functional gene remained unchanged since their divergence (Vanin, 1985), ...
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...  Incomplete Penetrance. Some people who have the gene mutation do not show the clinical effects.  Penetrance Limited to one gender. For example, when prostate cancer risk is inherited in an autosomal dominant manner, women who inherit the mutation are not affected; they can, however, pass the muta ...
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7. One gene one protein

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A change that makes a polypeptide defective has been discovered

... (A) During DNA replication, there was a deletion of a single nucleotide that codes for lysine (Lys), resulting in translation of a polypeptide without the Lys amino acid. ...
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...  Incomplete Penetrance. Some people who have the gene mutation do not show the clinical effects.  Penetrance Limited to one gender. For example, when prostate cancer risk is inherited in an autosomal dominant manner, women who inherit the mutation are not affected; they can, however, pass the muta ...
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7.27_genetics_lectur..

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Protein Synthesis PowerPoint

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Frameshift mutation



A frameshift mutation (also called a framing error or a reading frame shift) is a genetic mutation caused by indels (insertions or deletions) of a number of nucleotides in a DNA sequence that is not divisible by three. Due to the triplet nature of gene expression by codons, the insertion or deletion can change the reading frame (the grouping of the codons), resulting in a completely different translation from the original. The earlier in the sequence the deletion or insertion occurs, the more altered the protein. A frameshift mutation is not the same as a single-nucleotide polymorphism in which a nucleotide is replaced, rather than inserted or deleted. A frameshift mutation will in general cause the reading of the codons after the mutation to code for different amino acids. The frameshift mutation will also alter the first stop codon (""UAA"", ""UGA"" or ""UAG"") encountered in the sequence. The polypeptide being created could be abnormally short or abnormally long, and will most likely not be functional.Frameshift mutations are apparent in severe genetic diseases such as Tay-Sachs disease and Cystic Fibrosis; they increase susceptibility to certain cancers and classes of familial hypercholesterolaemia; in 1997, a frameshift mutation was linked to resistance to infection by the HIV retrovirus. Frameshift mutations have been proposed as a source of biological novelty, as with the alleged creation of nylonase, however, this interpretation is controversial. A study by Negoro et al (2006) found that a frameshift mutation was unlikely to have been the cause and that rather a two amino acid substitution in the catalytic cleft of an ancestral esterase amplified Ald-hydrolytic activity.
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