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Analysis by pulsed-field gel electrophoresis mutations in the
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... Summary. A mutagenesis system involving the insertion of a non-transposable antibiotic resistance gene cassette was used to generate stable mutations in the chromosome of Haemophilus influenzae type b strain Eagan. The mutations generated were shown by pulsedfield gel electrophoresis (PFGE) to have ...
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Nyholt and colleagues provided compelling evidence for the
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... dystrophin expression at 10%-20% of that detected in normal muscle [Barton-Davis et al 1999], a level that provided some degree of functional protection against contraction-induced damage. ...
Lesson Overview
Lesson Overview

... These complexes block the expression of genes producing mRNA complementary to the miRNA. RNAi technology is a powerful way to study gene expression in the laboratory. It also holds the promise of allowing medical scientists to turn off the expression of genes from viruses and cancer cells, and it ma ...
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X-inactivation



X-inactivation (also called lyonization) is a process by which one of the two copies of the X chromosome present in female mammals is inactivated. The inactive X chromosome is silenced by its being packaged in such a way that it has a transcriptionally inactive structure called heterochromatin. As nearly all female mammals have two X chromosomes, X-inactivation prevents them from having twice as many X chromosome gene products as males, who only possess a single copy of the X chromosome (see dosage compensation). The choice of which X chromosome will be inactivated is random in placental mammals such as humans, but once an X chromosome is inactivated it will remain inactive throughout the lifetime of the cell and its descendants in the organism. Unlike the random X-inactivation in placental mammals, inactivation in marsupials applies exclusively to the paternally derived X chromosome.
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