E1

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

Transport

Trains and locomotives

• E1 Series Shinkansen, a Japanese high-speed train
• Bavarian E I, a German steam engines locomotive model
• EMC E1, 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, an 1898 class of small 0-6-0T steam locomotive
• PRR E1, an American PRR 4-4-2 steam locomotive
• SP&S Class E-1, a 1934 steam locomotives class

Aircraft

• E1 Gavilán, a Mexican unmanned electrical-surveillance airplane
• E-1 Tracer, an American airborne early warning aircraft
• Fokker E.I (or E.1), a German fighter aircraft
• Junkers E.I, the Idflieg designation for the 1916 Junkers J1 aircraft
• LVG E.I, a 1915 German two-seat monoplane
• Standard E-1, a 1917 early American Army fighter aircraft

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, from Northern Ireland to Spain
• E1 European long distance path, a long-distance hiking route from Norway to Italy
• London Buses route E1, a transport for London contracted bus route
• E1, the North–South Expressway Northern Route in Malaysia

Science and mathematics

• Exponential integral, $E_1(z)= \int_1^\infty \frac{e^{-tz}}{t}\, {\rm d}t~$, mathematical function

Biochemistry

• E1 (HCV), a viral structural protein found in hepatitis C
• E1, an E1 mechanism in organic chemistry
• E1-enzymes, also known as Ubiquitin-activating enzymes, 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, a hormone
• Pyruvate dehydrogenase (E1), the first component enzyme of pyruvate dehydrogenase complex
• Acireductone synthase, an enzyme
• Haplogroup E1 (Y-DNA), a human Y-chromosome DNA haplogroup

Medicine

• E1-isoprostane, a type of isoprostane
• E01, the ICD-10 Chapter IV: Endocrine, nutritional and metabolic diseases code for Iodine-deficiency-related thyroid disorders and allied conditions

Brands, models and companies

• E1 Corp., a Korean chemical and oil company, member of the LS Group
• Honda E1, a predecessor of the ASIMO humanoid robot
• E1, a Mazda E type piston engine
• Olympus E-1, a digital single-lens reflex camera
• Entertainment One, an international media company
• E1 Music, an independent record label in the United States

Places

• E1 (Jerusalem), an area east of Jerusalem in the West Bank.
• E1 postcode district, London

Other uses

• E-1 (rank), the pay grade for enlisted ranks of Private, Airman Basic, and Seaman Recruit in the United States Military
• E1 grade, a difficulty level in rock climbing
• E-1 (rocket engine), a liquid propellant rocket engine
• E1 carrier, an E-carrier European telecommunications standard

See also

• 1E (disambiguation)