Edgepedia

Tropomyosin receptor kinase B

TrkB (NTRK2) is the receptor tyrosine kinase for BDNF and NT-4/5, driving neuronal survival, plasticity, and learning; dysregulated in gliomas and targeted by pan-TRK inhibitors and agonist antibodies.

Tropomyosin receptor kinase C

Tropomyosin receptor kinase C (TrkC, TRKC, NTRK3) is a receptor tyrosine kinase at 15q25.3, the specific receptor for neurotrophin-3, discovered in 1991; essential for proprioception and cardiogenesis, and an oncogenic driver when NTRK3 fusions occur in cancer.

Tropone

Tropone (cyclohepta-2,4,6-trien-1-one, C₇H₆O) is a non-benzenoid aromatic compound with a seven-membered ring bearing a ketone, the parent of the troponoids and a reactive synthon in synthesis.

Troponin

Troponin: cardiac regulatory protein complex (TnC, TnI, TnT) of striated muscle; its cardiac subunits cTnI and cTnT are the standard blood biomarkers for diagnosing myocardial infarction, now measured with high-sensitivity assays.

Troponin I

Troponin I (cTnI) is the inhibitory subunit of the troponin complex and a cardiac-specific biomarker for myocardial infarction; released 4-10 h after injury, measured by high-sensitivity immunoassays against the 99th percentile cutoff.

Troponin T

Troponin T (TnT), encoded by TNNT1, TNNT2, and TNNT3, is the tropomyosin-binding subunit of the troponin complex regulating striated muscle contraction; cardiac cTnT is a key heart-attack blood biomarker.

Tropos (methodology)

Tropos is an agent-oriented, requirements-driven software development methodology proposed by Castro, Kolp, and Mylopoulos in 2002, using actor, goal, and dependency concepts from i across all phases from early requirements analysis to implementation.

Troposphere

The troposphere is the lowest layer of Earth's atmosphere, holding about 75 to 80 percent of its mass and nearly all its water vapor, where almost all weather occurs.

Tropospheric ducting

Tropospheric ducting is radio propagation in which a lower-atmosphere layer traps radio waves and carries them far beyond the normal radio horizon, mostly at VHF and higher frequencies.

Tropospheric propagation

Tropospheric propagation is the transmission of radio waves through the troposphere, where temperature, pressure, and humidity bend, trap, or scatter signals, extending the radio horizon and enabling long-distance ducting.

Tropospheric scatter

Tropospheric scatter, or troposcatter, is an over-the-horizon radio communication method in which signals scatter off tropospheric irregularities, enabling links of roughly 100 to 1,000 miles.

Tropylium cation

The tropylium cation, also called the cycloheptatrienyl cation, is an aromatic C7H7+ carbocation with a planar seven-membered ring and delocalized positive charge, discovered as tropylium bromide in 1891.

Oct 20, 2026

Troriluzole

Troriluzole (BHV-4157, trigriluzole, proposed Vyglxia) is Biohaven's oral tripeptide prodrug of riluzole, a glutamate modulator studied in phase III trials for spinocerebellar ataxia and OCD.

Tros (crater on Ganymede)

Tros is a 94-km-wide central pit impact crater on Jupiter's moon Ganymede at 11.14°N, 27.26°W, named for Ganymede's Greek father, IAU-approved 1979, with bright rays and a 750-m-deep central pit.

Trospium

Trospium (trospium chloride, Sanctura) is a quaternary ammonium antimuscarinic for overactive bladder, FDA approved 2004, dosed 20 mg twice daily or 60 mg extended release; poorly crosses the blood-brain barrier and pairs with xanomeline in Cobenfy.

Trossachs

The Trossachs is a wooded, craggy glen-and-loch district of the Scottish Highlands between Loch Achray and Loch Katrine, famed through Walter Scott's Lady of the Lake and Rob Roy and now within Loch Lomond and the Trossachs National Park.

Trossingen Formation

Trossingen Formation (Knollenmergel, Feuerletten): late Norian Middle Keuper mudstone unit of SW Germany with carbonate nodules, playa-facies vertisols, and the famous Obere Mühle Plateosaurus trossingensis bonebed with over 80 skeletons.

Trostyanets Raion

Trostyanets Raion (Тростянецький район), a district in southeastern Sumy Oblast, Ukraine, centered on Trostyanets city; 1,047.8 km², about 33,400 residents; abolished 19 July 2020 and merged into Okhtyrka Raion. Distinct from the Vinnytsia Oblast namesake.

Trot

Trot (jog): the horse's two-beat diagonal gait, with opposite fore and hind legs moving together and a suspension phase. Speeds 7-30 mph, up to 14.2 m/s in harness; distinct from the lateral pace.

Trot (트로트) (music)

Trot (트로트, teuroteu; ppongjjak) is Korea's oldest popular music genre, formed during the Japanese colonial period under enka influence, defined by two-beat rhythm, pentatonic scales, and kkeokgi vocal bending, revived by TV audition shows.

Trotskyism

Trotskyism, the political theory of Leon Trotsky, holds that socialism requires international revolution and that Stalin's USSR was a bureaucratic degeneration from Leninism, expressed through permanent revolution and the Fourth International founded in 1938.

Trotter-Suzuki decomposition

The Trotter-Suzuki decomposition, also called Trotterization, approximates a quantum system's time evolution by exponentials of Hamiltonian terms, the standard approach to Hamiltonian simulation on quantum computers.

Trotter–Suzuki product formulas

Trotter–Suzuki product formulas, also called Trotterization, approximate the exponential of a sum of operators as a product of exponentials and are the most common quantum simulation method.

Trotula Corona

Trotula Corona, formerly Trotula Patera, is a 146-km-wide corona on Venus at 41.3°N, 18.9°E, IAU-named in 2003 for Trotula, the medieval Salernitan physician.

Trou de Billemont Tumulus

The Trou de Billemont Tumulus is a reconstructed Gallo-Roman burial mound at Antoing in Hainaut, Belgium, notable as the only regional tumulus combining a stone crown, corridor, niche vault, and outer enclosure.

Troubadour

Troubadours (Occitan: trobadors) were poet-composers of medieval Occitania in southern France who sang lyric poetry in Occitan, centered on the ideal of fin'amor, from the early 1100s into the 1300s.

Troubadour (West Hollywood, California)

The Troubadour, also known as Doug Weston's Troubadour, is a historic live music nightclub in West Hollywood, California, founded by Doug Weston in 1957 and known for launching careers.

Trouble (2024 film)

Trouble (Swedish: Strul) is a 2024 Swedish action comedy on Netflix, directed by Jon Holmberg, starring Filip Berg as an electronics salesman wrongfully convicted of murder; a remake of the 1988 cult film Strul with Björn Skifs.

Trouble (rapper)

Trouble (Mariel Semonte Orr, 1987-2022), Atlanta trap rapper also called Skoob or Trouble DTE; debut mixtape December 17th (2011), Mike WiLL-produced Edgewood (2018), killed in Conyers, Georgia, June 5, 2022.