Word: mutants
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...form of mutant mouse engineered by Tsai and her colleagues at HMS is starting to unravel what is considered to be one of the greatest enigmas in biology...
...elucidate the gene's effects, Tsai used a recently-developed technique which allows researchers to selectively create "knockout mice"--mutant mice who are lacking in a specific gene. The researchers can then study the effect the loss has on the mutants by recovering the excited gene for study...
...mutant mice, the corpus callosum--the bundle of fibers which connects the two hemispheres of the brain--was almost non-existent. Additionally, the general pattern of connections in the rest of the cortex seemed to be highly altered...
...This mutant provides the first evidence that such a signaling pathway exists," Tsai says...
...mistakenly touted as a kind of "morning after" treatment that allows people to relax their guard and engage in risky sexual behavior. By desensitizing the virus to medications, it could jeopardize a patient's ability to respond to future treatments. Worse yet, it could inadvertently create a mutant strain of virus resistant to all currently available drugs--a kind of super HIV--that could lead to a second, even more devastating AIDS epidemic...