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tRNA-splicing endonuclease subunit Sen15
Sen15 (TSEN15) is the smallest, noncatalytic structural subunit of the eukaryotic tRNA splicing endonuclease heterotetramer, pairing with Sen34; loss-of-function mutations cause pontocerebellar hypoplasia type 2.
tRNA(Ile2) 2-agmatinylcytidine synthetase
tRNA(Ile2) 2-agmatinylcytidine synthetase, also called tRNA(Ile2) agmatidine synthetase (TiaS), is an archaeal enzyme that attaches agmatine to the wobble cytidine of isoleucine tRNA, producing agmatidine, required for accurate AUA decoding.
tRNA/rRNA methyltransferase LasT, C-terminal domain
LasT C-terminal domain (InterPro IPR063618): auxiliary RNA-binding CTD of LasT, an uncharacterized E. coli tRNA/rRNA methyltransferase (b4403, K02533) in the SPOUT TrmJ/LasT family; the Cm32/Um32 activity belongs to TrmJ, not LasT.
tRNAHis guanylyltransferase catalytic domain
tRNAHis guanylyltransferase catalytic domain (Thg1): the RRM-fold polymerase-palm enzyme core that adds G−1 to tRNAHis in the reverse 3′–5′ direction via adenylylation, nucleotidyl transfer, and pyrophosphate removal, using a two-metal-ion mechanism.
Trnava, Slovakia
Trnava (Trnavský kraj) is one of Slovakia's eight self-governing regions, in western Slovakia, with the city of Trnava as its capital and about 566,000 people.
TRNT1-related SIFD
TRNT1-related SIFD is an autosomal recessive disorder caused by variants in the TRNT1 gene, combining sideroblastic anemia, recurrent fevers, B-cell immunodeficiency, and developmental delay, first described in 2013.
Troades
Troades ("The Trojan Women") is a first-century AD Latin tragedy in five acts by Seneca the Younger, reworking Euripides to dramatize the deaths of Astyanax and Polyxena after Troy's fall.
Troas (region)
Troas (Τρωάς), also known as the Troad, is an ancient region in northwestern Asia Minor whose strategic position beside the Hellespont made it prized, and which contains Troy.
Trobriand oral literature
Trobriand oral literature is the spoken myth, story, song, and magic of the Trobriand Islands of Papua New Guinea, transmitted largely in the Kilivila language.
Trocar
A trocar is a surgical device that pierces the body wall to place a cannula, creating an access channel for instruments, optics, and gas, especially in laparoscopy.
Trochaic tetrameter
Trochaic tetrameter is a verse meter built from four trochees, one of the three primary measures of classical Greek and Latin verse, used in drama for hurried or excited dialogue.
Trochidae
Trochidae, the top shells, is the largest family of Trochoidea vetigastropod marine snails, with over 600 species in conical, nacreous-shelled, corneous-operculum grazers and filter feeders worldwide.
Trochilus
Trochilus is a genus of hummingbirds established by Linnaeus in 1758, now containing only the two Jamaican streamertails, which differ chiefly in bill color: red in the Red-billed Streamertail and black in the Black-billed Streamertail.
Trochlear nerve
Trochlear nerve (CN IV), fourth cranial nerve, purely motor to the superior oblique muscle; smallest cranial nerve with the longest intracranial course and the only dorsal brainstem exit; palsy causes vertical diplopia and head tilt.
Trochoidea (superfamily)
Trochoidea (Rafinesque, 1815), also called Trochacea, is the largest vetigastropod snail superfamily, over 2,000 species of top and turban shells worldwide, with a Middle Triassic fossil record and unstable family-level classification.
Trochophore and early larval development in gastropods
The trochophore is an early free-swimming larval stage of many marine molluscs, including gastropods, arising from spiral cleavage and swimming by bands of cilia until it becomes a veliger larva.
Troels Skrydstrup
Troels Skrydstrup is a Danish organic chemist and professor at Aarhus University, known for catalysis with small gaseous molecules, CO2 utilization, and catalytic recycling of thermoset plastics.
Troels Troels-Lund
Troels Troels-Lund (1840–1921) was a Danish cultural historian whose 14-volume Daily Life in the Nordic Countries in the Sixteenth Century, published 1879–1901, depicted ordinary life in Denmark and Norway.
Troeven
Troeven, Dutch for "trumps", is a four-player partnership point-trick card game from southern Limburg, a 32-card variant of Belgian Couillon with tree-branch scoring, described by Harry Tiggelovend.
Troff
Troff, known on some systems as ditroff, is a document formatting program developed at Bell Labs for Unix around 1973, still the standard formatter of Unix manual pages.
Trofim Lomakin
Trofim Lomakin (Трофим Фёдорович Ломакин, 1924–1973), Soviet weightlifter: 1952 Helsinki Olympic light-heavyweight gold (417.5 kg total), 1960 Rome silver, world champion 1957 and 1958, ten world records, career ruined by alcoholism.
Trofim Lysenko (Трофи́м Дени́сович Лысе́нко)
Trofim Denisovich Lysenko (Трофи́м Дени́сович Лысе́нко, 1898–1976), Soviet agronomist behind Lysenkoism and Michurinism: rejected Mendelian genetics, promoted vernalization, dominated Soviet biology 1948–1965 until his 1965 downfall.
Trofinetide
Trofinetide, sold as Daybue, is a synthetic peptide drug approved in the United States in March 2023 as the first FDA-approved treatment for Rett syndrome.
Trofosfamide
Trofosfamide (TFF, Ixoten, A-4828) is an oral oxazaphosphorine prodrug metabolized mainly to ifosfamide; approved in Europe for lymphoma, used off-label as low-dose palliative/maintenance therapy in soft tissue sarcoma.
Troglav
Troglav (Veliki Troglav), 1,913 m, is the highest peak of the Dinara massif on the Croatia–Bosnia and Herzegovina border, in Livno municipality, BiH; distinct from a lower Troglav mountain near Kraljevo, Serbia.
Troglitazone
Troglitazone, sold as Rezulin, was the first thiazolidinedione approved in the United States for type 2 diabetes, in January 1997, and was withdrawn in March 2000 over sometimes fatal liver injury.
Troglodytes
Troglodytes (Vieillot, 1809) is a genus of wrens in Troglodytidae, including the House Wren and Eurasian wren; molecular phylogenies show it is paraphyletic, with northern species moved to Nannus.
Trogoderma granarium
Trogoderma granarium, the khapra beetle (EPPO code TROGGA), is a flightless dermestid beetle and A2 quarantine pest of stored grains, native to the Indian subcontinent, with diapausing larvae surviving up to six years.
Trogodytice
Trogodytice (Τρωγλοδυτική, Trogodytike), ancient Red Sea coastal region of the Trogodytes, from Suez to Bab al-Mandab in modern Eritrea and Sudan; home of Ptolemaic Berenike Trogodytika and Ptolemais of the Hunts.
Trogon
Trogon (genus, Brisson 1760) is the largest Neotropical trogon genus, family Trogonidae, order Trogoniformes, with a unique heterodactyl foot; recent 2023-2025 splits raised its species count and renamed several English names.