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Aldehyde dehydrogenase
Aldehyde dehydrogenases (ALDHs), NAD(P)+-dependent enzymes oxidizing aldehydes to carboxylic acids; 19 human genes, ancient superfamily in all three domains, conserved Asn-Glu-Cys catalytic triad, linked to Sjögren-Larsson syndrome and alcohol sensitivity.
Aldehyde oxidase
Aldehyde oxidase (AOX1, EC 1.2.3.1) is a cytosolic molybdo-flavoenzyme related to xanthine oxidase that oxidizes aldehydes and N-heterocycles, metabolizes drugs in phase I metabolism, and reduces nitrite to nitric oxide.
Aldehyde tag
The aldehyde tag is a genetically encoded six-residue peptide sequence, LCTPSR, that directs the enzyme FGE to install an aldehyde handle for site-specific protein modification.
Alden (lunar crater)
Alden is an IAU-approved impact crater on the Moon, listed in the USGS Gazetteer of Planetary Nomenclature with a diameter of 111.44 km, placing it among the Moon's large complex craters.
Alden Ehrenreich
Alden Caleb Ehrenreich, American actor born in Los Angeles, star of Hail, Caesar!, Solo: A Star Wars Story (young Han Solo), Cocaine Bear, Fair Play, Oppenheimer, Weapons, and Tony-nominated for Broadway's Becky Shaw.
Alden Holmes Miller
Alden Holmes Miller (1906–1965) was an American ornithologist who directed Berkeley's Museum of Vertebrate Zoology from 1940 to 1965 and edited The Condor for over three decades.
Alden P. Yates
Alden P. Yates was an engineer and construction executive who served as president of Bechtel Group from 1983, succeeding George P. Shultz, and died in 1989.
Alden Richards
Alden Richards (Richard Reyes Faulkerson Jr., born 1992) is a Filipino actor, host, and entrepreneur, the AlDub star of Eat Bulaga! and lead of Hello, Love, Goodbye and Hello, Love, Again, titled Asia's Multimedia Star.
Alder
Alder (Alnus), a genus of about 40 birch-family trees and shrubs of the temperate Northern Hemisphere to the Andes, identified by stalked buds and persistent cones, and fixing nitrogen through Frankia root nodules.
Alder Lake
Alder Lake is the codename for Intel's 12th generation Core processors, introduced in October 2021 as Intel's first performance hybrid x86 design, combining P-cores and E-cores on one chip.
Alderaan
Alderaan is a fictional Star Wars planet, a peaceful Core World ruled by House Organa and Leia Organa's homeworld, destroyed by Grand Moff Tarkin's Death Star in A New Hope, leaving an asteroid field.
Alderamin on the Sky (ねじ巻き精霊戦記 天鏡のアルデラミン)
Alderamin on the Sky (ねじ巻き精霊戦記 天鏡のアルデラミン), also Nejimaki Seirei Senki: Tenkyou no Alderamin, is a Japanese fantasy military light novel series by Bokuto Uno, 14 Dengeki Bunko volumes 2012–2018, adapted into a 2016 Madhouse TV anime; Katvarna Empire vs Kioka Republic.
Alderley Edge
Alderley Edge: village and civil parish in Cheshire East, England, south of Manchester. Railway village from 1842, formerly Chorlegh; England's oldest known metal-mining site, SSSI escarpment, wizard legend, National Trust woodland.
Alderman
Alderman: an elected municipal council member, equivalent to councilman or councillor. From Old English ealdormann (shire chief), later guild headman and city magistrate; abolished in England and Wales in 1974 except the City of London; still used in Chicago, St. Louis, and Annapolis.
Alderney
Alderney, the most northerly Channel Island about 8 miles from Normandy, is a self-governing Crown dependency within the Bailiwick of Guernsey, governed by the States of Alderney, evacuated in WWII and home to a large Ramsar wetland site.
Aldershot
Aldershot, Hampshire, England: garrison town known as the Home of the British Army since the 1854 founding of the British Army's first permanent training camp; also a Rushmoor borough town and parliamentary constituency.
Aldershot Town F.C.
Aldershot Town F.C., the Shots, English National League club formed 22 April 1992 as a phoenix club after Aldershot FC folded; won Conference Premier 2008 and FA Trophy 2025, entered administration 2013, owned by Deane Wood since 2026.
Alderson disk
The Alderson disk is a hypothetical artificial megastructure proposed by Dan Alderson and popularized by Larry Niven in 1974: a circular plate with a star passing through its central hole.
Alderson Oil and Gas Field
Alderson Oil and Gas Field is an oil and gas field in southern Alberta, Canada, where a 1883 railway water-drilling crew accidentally discovered natural gas, possibly Canada's first.
ALDH18A1
ALDH18A1 (P5CS, HGNC:9722) is a human gene on 10q24.1 encoding the bifunctional mitochondrial enzyme delta-1-pyrroline-5-carboxylate synthase, which converts glutamate toward proline, ornithine, and arginine; variants cause cutis laxa (ADCL3, ARCL3A/de Barsy) and spastic paraplegia (SPG9A/B).
ALDH1A1
ALDH1A1 (RALDH1, ALDH1), human gene ID 216, encodes the cytosolic aldehyde dehydrogenase that oxidizes retinaldehyde to retinoic acid, detoxifies acetaldehyde, regulates adipose thermogenesis, and marks cancer stem cells.
ALDH2
ALDH2 (aldehyde dehydrogenase 2) is a mitochondrial matrix tetrameric enzyme that oxidizes acetaldehyde and other reactive aldehydes to carboxylic acids; its ALDH2*2 variant causes East Asian alcohol flushing and reduced alcohol dependence risk.
ALDH3A2
ALDH3A2 (FALDH, ALDH10), human gene at 17p11.2 encoding microsomal fatty aldehyde dehydrogenase, which oxidizes long-chain fatty aldehydes to fatty acids; biallelic mutations cause Sjögren-Larsson syndrome.
ALDH7A1
ALDH7A1 (antiquitin, EPD/PDE/ATQ1) is a human chromosome 5q23.2 gene encoding an aldehyde dehydrogenase that catalyzes the final lysine catabolism step; biallelic mutations cause pyridoxine-dependent epilepsy, treated with vitamin B6.
Aldhelm
Aldhelm (died 709) was a West Saxon abbot of Malmesbury and first bishop of Sherborne, the first Anglo-Saxon known to write extensively in Latin prose and verse.
Aldi
Aldi (Albrecht-Diskont) is the shared brand of German discount grocers ALDI Nord and ALDI SÜD, split in 1961 by brothers Karl and Theo Albrecht; over 90% private label, €112 billion 2023 revenue, stores across Europe, the US, and Australia.
Aldi Nord
Aldi Nord is a German hard-discount grocery retailer headquartered in Essen, formed when the Albrecht brothers split their stores in 1961; it owns Trader Joe's.
Aldi Süd
Aldi Süd, also known as Aldi South, is a German discount grocery chain with about 7,000 stores in eleven countries, created when the Albrecht brothers split their business in 1961.
Aldicarb
Aldicarb is a synthetic oxime carbamate pesticide used as an insecticide, acaricide, and nematicide. It functions by inhibiting acetylcholinesterase, making it one of the most acutely toxic registered substances.
Aldimorph
Aldimorph (CAS 91315-15-0, aldimorphe, альдиморф) is an obsolete morpholine fungicide mixture, once used against powdery mildew in cereals; not approved in the EU or GB since the 2002 non-inclusion decision.