منابع مشابه
Going Undercover
on the brain are introduced, with particular discussion the depth of treatment is uneven, as if one committee of harrowing experiences of children raised in an alterna-member or another briefly escaped the restraints of the tive sex role as a result of genetic or surgical accident. task. However, overall it hangs together remarkably well. Short sections summarize the evidence for sex differ-Gen...
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receptor gene that nestles nearest the single enhancer available in the genome is the single gene that gets expressed in a given cell. Various other models for odorant receptor choice had already been deemed unlikely or incorrect. A unique set of transcription factors for each receptor sounded too complicated. And irreversible DNA recombination to place a single receptor gene at a single expres...
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N Engl J Med 2004;351:1014-9. Copyright © 2004 Massachusetts Medical Society. A 67-year-old overweight man was seen by his physician because of a two-month history of shortness of breath, a nonproductive cough, and bilateral swelling of the lower extremities. He also reported a tight sensation in the neck, occasional wheezing, and an increase in dyspnea after meals. The patient noted the onset ...
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Under normal circumstances, the cells of the immune system (T cells, B cells, and other lymphocytes) cooperate to police our bodies for evidence of disease, mounting highly coordinated attacks against foreign invaders and cancerous cells. However, the immune system can occasionally become deranged, directing its arsenal against friend not foe, to attack healthy body tissues—a condition called a...
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Mitochondria are one of most characterized metabolic hubs of the cell. Here, crucial biochemical reactions occur and most of the cellular adenosine triphosphate (ATP) is produced. In addition, mitochondria act as signalling platforms and communicate with the rest of the cell by modulating calcium fluxes, by producing free radicals, and by releasing bioactive proteins. It is emerging that mitoch...
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ژورنال
عنوان ژورنال: Science
سال: 2020
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.370.6519.927-c