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Renilla
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D048790 |
[A genus of bioluminescent marine invertebrates in the family Renillidae, order Pennatulacea, class ANTHOZOA. It contains Renilla LUCIFERASE which oxidizes coelenterazine resulting in LUMINESCENCE.
] |
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Renin
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D012083 |
[A highly specific (Leu-Leu) endopeptidase that generates ANGIOTENSIN I from its precursor ANGIOTENSINOGEN, leading to a cascade of reactions which elevate BLOOD PRESSURE and increase sodium retention by the kidney in the RENIN-ANGIOTENSIN SYSTEM. The enzyme was formerly listed as EC 3.4.99.19.
] |
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Renin-Angiotensin System
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D012084 |
[A BLOOD PRESSURE regulating system of interacting components that include RENIN; ANGIOTENSINOGEN; ANGIOTENSIN CONVERTING ENZYME; ANGIOTENSIN I; ANGIOTENSIN II; and angiotensinase. Renin, an enzyme produced in the kidney, acts on angiotensinogen, an alpha-2 globulin produced by the liver, forming ANGIOTENSIN I. Angiotensin-converting enzyme, contained in the lung, acts on angiotensin I in the plasma converting it to ANGIOTENSIN II, an extremely powerful vasoconstrictor. Angiotensin II causes contraction of the arteriolar and renal VASCULAR SMOOTH MUSCLE, leading to retention of salt and water in the KIDNEY and increased arterial blood pressure. In addition, angiotensin II stimulates the release of ALDOSTERONE from the ADRENAL CORTEX, which in turn also increases salt and water retention in the kidney. Angiotensin-converting enzyme also breaks down BRADYKININ, a powerful vasodilator and component of the KALLIKREIN-KININ SYSTEM.
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Renshaw Cells
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D066293 |
[Ipsilateral glycinergic inhibitory interneurons of the SPINAL CORD VENTRAL HORN which modulate recurrent firing of MOTOR NEURONS. They develop from embryonic progenitor domain V1.Ia inhibitory interneurons which also originate from V1 are responsible for reciprocal inhibition of MOTONEURONS.
] |
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Reoperation
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D012086 |
[A repeat operation for the same condition in the same patient due to disease progression or recurrence, or as followup to failed previous surgery.
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Reoviridae
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D012087 |
[A family of unenveloped RNA viruses with cubic symmetry. The twelve genera include ORTHOREOVIRUS; ORBIVIRUS; COLTIVIRUS; ROTAVIRUS; Aquareovirus, Cypovirus, Phytoreovirus, Fijivirus, Seadornavirus, Idnoreovirus, Mycoreovirus, and Oryzavirus.
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Reoviridae Infections
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D012088 |
[Infections produced by reoviruses, general or unspecified.
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Reperfusion
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D015424 |
[Restoration of blood supply to tissue which is ischemic due to decrease in normal blood supply. The decrease may result from any source including atherosclerotic obstruction, narrowing of the artery, or surgical clamping. It is primarily a procedure for treating infarction or other ischemia, by enabling viable ischemic tissue to recover, thus limiting further necrosis. However, it is thought that reperfusion can itself further damage the ischemic tissue, causing REPERFUSION INJURY.
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Reperfusion Injury
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D015427 |
[Adverse functional, metabolic, or structural changes in ischemic tissues resulting from the restoration of blood flow to the tissue (REPERFUSION), including swelling; HEMORRHAGE; NECROSIS; and damage from FREE RADICALS. The most common instance is MYOCARDIAL REPERFUSION INJURY.
] |
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Repetition Priming
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D060865 |
[A type of procedural memory manifested as a change in the ability to identify an item as a result of a previous encounter with the item or stimuli.
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Repetitive Sequences, Amino Acid
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D020449 |
[A sequential pattern of amino acids occurring more than once in the same protein sequence. There often is some sequence variation between the repeated segments. Many PROTEIN DOMAINS are constituted from repeats.
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Repetitive Sequences, Nucleic Acid
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D012091 |
[Sequences of DNA or RNA that occur in multiple copies. There are several types: INTERSPERSED REPETITIVE SEQUENCES are copies of transposable elements (DNA TRANSPOSABLE ELEMENTS or RETROELEMENTS) dispersed throughout the genome. TERMINAL REPEAT SEQUENCES flank both ends of another sequence, for example, the long terminal repeats (LTRs) on RETROVIRUSES. Variations may be direct repeats, those occurring in the same direction, or inverted repeats, those opposite to each other in direction. TANDEM REPEAT SEQUENCES are copies which lie adjacent to each other, direct or inverted (INVERTED REPEAT SEQUENCES).
, DNA whose role appears to be its own replication, e.g., transposable elements and some SATELLITE DNA.
, D012091
] |
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Replantation
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D012092 |
[Restoration of an organ or other structure to its original site.
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Replica Techniques
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D016628 |
[Methods of preparing tissue specimens for visualization using an electron microscope, usually a scanning electron microscope. The methods involve the creation of exact copies of the specimens by making a mold or cast (i.e., replica) of the specimen.
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Replication Origin
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D018741 |
[A unique DNA sequence of a replicon at which DNA REPLICATION is initiated and proceeds bidirectionally or unidirectionally. It contains the sites where the first separation of the complementary strands occurs, a primer RNA is synthesized, and the switch from primer RNA to DNA synthesis takes place. (Rieger et al., Glossary of Genetics: Classical and Molecular, 5th ed)
] |
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Replication Protein A
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D051716 |
[A single-stranded DNA-binding protein that is found in EUKARYOTIC CELLS. It is required for DNA REPLICATION; DNA REPAIR; and GENETIC RECOMBINATION.
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Replication Protein C
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D051818 |
[A DNA-binding protein and AAA ATPase that consists of 5 polypeptides and plays an essential role in DNA REPLICATION in eukaryotes. It binds DNA PRIMER-template junctions and recruits PROLIFERATING CELL NUCLEAR ANTIGEN and DNA POLYMERASES to the site of DNA synthesis.
] |
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Replicon
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D012093 |
[Any DNA sequence capable of independent replication or a molecule that possesses a REPLICATION ORIGIN and which is therefore potentially capable of being replicated in a suitable cell. (Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed)
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Repression, Psychology
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D012094 |
[The active mental process of keeping out and ejecting, banishing from consciousness, ideas or impulses that are unacceptable to it.
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Repression-Sensitization
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D012095 |
[Defense mechanisms involving approach and avoidance responses to threatening stimuli. The sensitizing process involves intellectualization in approaching or controlling the stimulus whereas repression involves unconscious denial in avoiding the stimulus.
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