منابع مشابه
RNA Polymerase Clamps Down
RPB1 (which is not present in bacterial RNAP) is not Gene expression in all cells requires synthesis of mRNAs resolved in the structures. by an evolutionarily conserved, multisubunit RNA polyAs RNAP transcribes (Figure 1B), DNA enters the enmerase (RNAP). A series of recent breakthroughs in zyme in the first chamber, termed the jaw-lobe module. X-ray crystallography of RNAP has begun to reveal ...
متن کاملNew Growth of Tonsil and Faucial Pillars.—h. Clayton Fox.—
duced. Mr. Walsham, he remembered, used ordinary rubber drainagetubes passed through the nose after septum operations. The tubes were perforated. The perforating was an advantage. Sir WILLIAM MILLIGAN agreed that they were excellent tubes, but it raised the question whether tubes were desirable at all. Mr. W. STUAET-LOW thought this question would make an excellent subject for a set discussion....
متن کاملTonsil fibromatosis.
Fibromatosis is a non-metastatic, however locally invasive tumor that may infiltrate muscle, fat, and bone. It may be fatal depending on its location. Tumors in the head and neck are particularly dangerous. These fibroblast tumors have poorly defined margins and are not encapsulated. Anaplasia and invasion of nerves and vessels are not present; mitosis is rare and there may be collagen between ...
متن کاملSurge Suppressors and Clamps
A tutorial paper with a review of the technologies available in the mid-eighties for surge protection of lowvoltage end-user equipment. The principles of operation are described for “crowbar devices” (now generally described under the standardized name of “voltage switching devices”) and for “voltage clamping devices: (now generally described under the standardized name of “voltage limiting dev...
متن کاملClamp loaders and sliding clamps.
A coherent view of the structure and function of DNA polymerase processivity factors (sliding clamps and clamp loaders) is emerging from recent structural studies. Crystal structures of sliding clamps from the T4 and RB69 bacteriophages, and from an archaebacterium expand the gallery of ring-shaped processivity factors and clarify how the clamp interacts with the DNA polymerase. Crystallographi...
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ژورنال
عنوان ژورنال: JAMA: The Journal of the American Medical Association
سال: 1913
ISSN: 0098-7484
DOI: 10.1001/jama.1913.04340260018011