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Kinetic-segregation is a model proposed for the mechanism of T-cell receptor (TCR) triggering. [1] [2] It offers an explanation for how TCR binding to its ligand triggers T-cell activation, based on size-sensitivity for the molecules involved. Simon J. Davis and Anton van der Merwe, University of Oxford, proposed this model in 1996.
The androgen receptor ( AR ), also known as NR3C4 (nuclear receptor subfamily 3, group C, member 4), is a type of nuclear receptor [9] that is activated by binding any of the androgenic hormones, including testosterone and dihydrotestosterone, [10] in the cytoplasm and then translocating into the nucleus.
Niemann–Pick type C ( NPC) (colloquially, "Childhood Alzheimer's " [1]) is a lysosomal storage disease associated with mutations in NPC1 and NPC2 genes. Niemann–Pick type C affects an estimated 1:150,000 people. [2] Approximately 50% of cases present before 10 years of age, but manifestations may first be recognized as late as the sixth decade.
Sinoatrial node shown at 1. The rest of the conduction system of the heart is shown in blue. The sinoatrial node (also known as the sinuatrial node, SA node or sinus node) is an oval shaped region of special cardiac muscle in the upper back wall of the right atrium made up of cells known as pacemaker cells. The sinus node is approximately 15 mm ...
The spindle assembly checkpoint (SAC) is an active signal produced by improperly attached kinetochores, which is conserved in all eukaryotes. The SAC stops the cell cycle by negatively regulating CDC20, thereby preventing the activation of the polyubiquitynation activities of anaphase promoting complex (APC).
Pulse-chase analysis of auxin signal transduction in an Arabidopsis thaliana wildtype and an axr2-1 mutant. Wild-type and axr2-1 seedlings were labeled with 35S- methionine , and AXR2/axr2-1 protein was immunoprecipitated either immediately after the labeling period (t = 0) or following a 15-minute chase with unlabeled methionine (t = 15).
In the 1980s, Chase became a part of the zip code 21220 after a new, larger post office was built in Middle River to serve the entire area. The old zip code (21027) and post office remain for the purpose of P.O. boxes. On January 4, 1987, Amtrak Train 94 crashed into three Conrail freight locomotives in Chase.
Cardiac pacemaker. The contraction of cardiac muscle ( heart muscle) in all animals is initiated by electrical impulses known as action potentials that in the heart are known as cardiac action potentials. The rate at which these impulses fire controls the rate of cardiac contraction, that is, the heart rate. The cells that create these rhythmic ...