E1, E01, E.I or E-1 may refer to:

Transportation

Aircraft

* Azcárate E-1, a Mexican sesquiplane trainer * Fokker E.I, a German fighter aircraft *

Grumman E-1 Tracer The Grumman E-1 Tracer was the first purpose-built airborne early warning aircraft used by the United States Navy. It was a derivative of the Grumman C-1 Trader and entered service in 1958. It was replaced by the more modern Grumman E-2 Hawke ...

, an American airborne early warning aircraft * Hydra Technologies E1 Gavilán, a hand-launched Mexican unmanned electronic surveillance drone * Junkers E.I, the Idflieg designation for the 1916 Junkers J1 monoplane *

LVG E.I The LVG E.I was a German two-seat monoplane of World War I. The E.I was unusual among monoplanes of its time in that it featured ailerons as opposed to the then-conventional (for monoplanes) wing warping. It was fitted with both a rearward firin ...

, a 1915 German two-seat monoplane * NFW E.I, a 1917 German monoplane fighter * Pfalz E.I, a Morane-Saulnier H monoplane built under licence for Germany * Siemens-Schuckert E.I, a 1915 German single seat monoplane * Standard E-1, a 1917 early American Army fighter aircraft

Automobiles

* BMW E1, a 1991 and 1993 German electric/hybrid city car concept * BYD e1, a 2019–present Chinese electric city car *

Dongfeng Fengguang E1 The Renault Kwid is a crossover city car produced by the French car manufacturer Renault, initially intended for the Indian market and launched in 2015. In 2017, an improved Brazilian version was introduced for Latin American markets. Its batte ...

, a 2019–present Chinese electric mini crossover *

Haima E1 The Haima 1 or Haima Aishang (Chinese: 海马爱尚) is a city car produced by Haima positioned below the Haima 2 subcompact. Overview Originally marketed as the Haima M11 when revealed as a concept car in 2010. Initial styling of the Hai ...

, a 2020–present Chinese electric city car * Roewe, a 2012 Chinese electric city car concept * E1, a Mazda E type piston engine

Submarines

* HMS ''E1'', an E-class submarine of the Royal Navy * USS ''E-1'' (SS-24), a 1917 E-class submarine of the United States Navy

Roads

* E01, Southern Expressway in Sri Lanka *

European route E01 European route E1 is a series of roads in Europe, part of the United Nations International E-road network, running from Larne, Northern Ireland to Seville, Spain. There is a sea crossing between Rosslare Harbour, in Ireland, and Ferrol, but ...

, from Northern Ireland to Spain *

E1 European long distance path The E1 European long-distance path, or just E1 path, is one of the European long-distance paths designated by the European Ramblers' Association. It has a total length of some . It begins in Norway at Nordkapp, and crosses the Kattegat between S ...

, a long-distance hiking route from Norway to Italy *

London Buses route E1 This is a list of Transport for London (TfL) contracted bus routes in London, England, as well as commercial services that enter the Greater London area (except coaches). Bus services in London are operated by Abellio London, Arriva London, G ...

, a transport for London contracted bus route *

Tomei Expressway Tomei may refer to: People with the surname Tomei, which is an Italian version of Thomas *Concetta Tomei, (born 1945), American actress *Louis Tomei (1910–1955), American racecar driver *Marisa Tomei, (born 1964), American actress Other: *Tōmei ...

and Meishin Expressway, route E1 in Japan *

North–South Expressway Northern Route The North–South Expressway Northern Route is an interstate controlled-access highway running parallel to the northwestern coast of Peninsular Malaysia. The expressway forms the north section of the North–South Expressway, passing thr ...

and

New Klang Valley Expressway The New Klang Valley Expressway (NKVE), designated E1, is a controlled-access highway located entirely within the Klang Valley region of Selangor and Kuala Lumpur in Peninsular Malaysia. The expressway begins at the settlement of Bukit Raja nea ...

, route E1 in Malaysia *

E1 expressway (Philippines) Expressway (E1) forms part of the Philippine expressway network. It runs through western Luzon from Quezon City in the south to Rosario in the north. Quezon City to Mabalacat The southern section of the E1 forms most of the North Luzon Expressw ...

(

North Luzon Expressway The North Luzon Expressway (NLEX), signed as E1 of the Philippine expressway network, partially as N160 of the Philippine highway network, and R-8 of the Metro Manila arterial road network, is a limited-access toll expressway that connects ...

Subic–Clark–Tarlac Expressway The Subic–Clark–Tarlac Expressway (SCTEX), signed as E1 and E4 of the Philippine expressway network and R-8 of the Metro Manila arterial road network, is controlled-access toll expressway in the Central Luzon region of the Philippines. Fro ...

, and

Tarlac–Pangasinan–La Union Expressway The Tarlac–Pangasinan–La Union Expressway (TPLEX), signed as E1 of the Philippine expressway network and R-8 of the Metro Manila arterial road network, is a controlled-access toll expressway that connects the Central Luzon region with the I ...

), expressway route in the Philippines *

E1 expressway (Pakistan) The E1 Expressway or Peshawar-Torkham Expressway (Urdu: , ps, د تورخم بزرگراه) is a proposed controlled-access expressway which will link the border-town of Torkham to Peshawar in Khyber Pakhtunkhwa, Pakistan Pakistan ( ur ...

Trains and locomotives

* E1 Series Shinkansen, a Japanese high-speed train * Bavarian E I, a German steam engines locomotive model *

EMC E1 The EMC E1 was an early passenger-train diesel locomotive developing 1,800 hp, with an A1A-A1A wheel arrangement, and manufactured by Electro-Motive Corporation of La Grange, Illinois. They were built during 1937 and 1938 for the Atchison, T ...

, a diesel locomotive * LB&SCR E1 class, an 1874 British 0-6-0 steam locomotive * NCC Class E1, a Northern Counties Committee Irish steam locomotive *

NER Class E1 The North Eastern Railway Class E1, classified as Class J72 by the London and North Eastern Railway (LNER), is a class of small 0-6-0T steam locomotives designed by Wilson Worsdell for shunting. They had inside cylinders and Stephenson va ...

, an 1898 class of small 0-6-0T steam locomotive *

PRR E1 Pennsylvania Railroad's E1 class comprised three experimental 4-4-2 (locomotive), Atlantic 4-4-2 locomotives built in 1899 to compete with the Reading Railroad on the Philadelphia, Pennsylvania (Camden, New Jersey), to Atlantic City, New Jersey, hi ...

, an American PRR 4-4-2 steam locomotive * SP&S Class E-1, a 1934 steam locomotives class

Science and mathematics

Biochemistry

E1 (HCV) E1 is one of two subunits of the envelope glycoprotein found in the hepatitis C virus. The other subunit is E2. This protein is a type 1 transmembrane protein with a highly glycosylated N-terminal ectodomain and a C-terminal hydrophobic anchor. Af ...

, a viral structural protein found in hepatitis C * E1, a unimolecular elimination mechanism in organic chemistry * E1-enzymes, also known as

Ubiquitin-activating enzyme Ubiquitin-activating enzymes, also known as E1 enzymes, catalyze the first step in the ubiquitination reaction, which (among other things) can target a protein for degradation via a proteasome. This covalent bond of ubiquitin or ubiquitin-like pro ...

s, an enzyme which catalyzes the first step in the ubiquitination reaction, which targets a protein for degradation via a proteasome] * E1 regulatory sequence for the insulin gene *

Estrone Estrone (E1), also spelled oestrone, is a steroid, a weak estrogen, and a minor female sex hormone. It is one of three major endogenous estrogens, the others being estradiol and estriol. Estrone, as well as the other estrogens, are synthesized ...

, a hormone *

Pyruvate dehydrogenase Pyruvate dehydrogenase is an enzyme that catalyzes the reaction of pyruvate and a lipoamide to give the acetylated dihydrolipoamide and carbon dioxide. The conversion requires the coenzyme thiamine pyrophosphate. Pyruvate dehydrogenase is u ...

(E1), the first component enzyme of pyruvate dehydrogenase complex *

Acireductone synthase Acireductone synthase (EC number 3.1.3.77, E1, E-1 enolase-phosphatase) is an enzyme with systematic name A systematic name is a name given in a systematic way to one unique group, organism, object or chemical substance, out of a specific populati ...

, an enzyme * Haplogroup E1 (Y-DNA), a human Y-chromosome DNA haplogroup

Mathematics

* Exponential integral,

E_1(z)= \int_1^\infty \frac\, t~

, mathematical function * the

E1 series (number series) The E series is a system of preferred numbers (also called preferred values) derived for use in electronic components. It consists of the E3, E6, E12, E24, E48, E96 and E192 series, where the number after the 'E' designates the quantity of ...

of preferred numbers

Medicine

E1-isoprostane The isoprostanes are prostaglandin-like compounds formed ''in vivo'' from the free radical-catalyzed peroxidation of essential fatty acids (primarily arachidonic acid) without the direct action of cyclooxygenase (COX) enzymes. The compounds were d ...

, a type of isoprostane

Businesses and organizations

E1 Music MNRK Music Group (pronounced "monarch", formerly known as Koch Records and eOne Music) is a New York City-based independent record label and music management company. It was formed in 2009 from the music assets of Koch Entertainment, which had ...

, an independent record label in the United States * E1 Corp., a Korean chemical and oil company, member of the

LS Group LS Group is a South Korean ''chaebol'' (conglomerate) mostly in electrics, electricity, materials and energy sectors. It is composed of LS Corp. (''see below''), E1 (LPG), and YESCO (LNG). "LS Corp." is a holding company, which comprises LS Ca ...

* Entertainment One, an international media company

Electronics

Honda E1 The E series was a collection of successive humanoid robots created by the Honda Motor Company between the years of 1986 and 1993. These robots were only experimental, but later evolved into the Honda P series, with Honda eventually amassing the kno ...

, a predecessor of the ASIMO humanoid robot *

Olympus E-1 The Olympus E-1, introduced in 2003, was the first DSLR system camera designed from the ground up for digital photography This contrasts with its contemporaries which offered systems based on reused parts from previous 135 film systems, modified ...

, a digital single-lens reflex camera

Places

* E1 (Jerusalem), an area east of Jerusalem in the West Bank * E1 postcode district, London, England, United Kingdom

Other uses

* E01, ECO code for the closed variation of the

Catalan Opening The Catalan Opening is a chess opening where White plays d4 and c4 and fianchettoes the white bishop on g2. A common opening sequence is 1.d4 Nf6 2.c4 e6 3.g3, although various other openings can transpose into the Catalan. The ''Encyclopaedia of ...

in chess * E01, the Encase Image File Format * E-1 (rank), the pay grade for enlisted ranks of Private, Airman Basic, and Seaman Recruit in the United States Military *

E1 grade In rock climbing, mountaineering, and other climbing disciplines, climbers give a grade to a climbing route or boulder problem, intended to describe concisely the difficulty and danger of climbing it. Different types of climbing (such as spo ...

, a difficulty level in rock climbing * E-1 (rocket engine), a liquid propellant rocket engine * E1 carrier, an

E-carrier The E-carrier is a member of the series of carrier systems developed for digital transmission of many simultaneous telephone calls by time-division multiplexing. The European Conference of Postal and Telecommunications Administrations (CEPT) ori ...

European telecommunications standard * E1, an AMD CPU from the

Bobcat (microarchitecture) The AMD Bobcat Family 14h is a microarchitecture created by AMD for its AMD APUs, aimed at a low-power/low-cost market. It was revealed during a speech from AMD executive vice-president Henri Richard in Computex 2007 and was put into production ...

family