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Influenza hemagglutinin (HA) or haemagglutinin [p] (British English) is a homotrimeric glycoprotein found on the surface of influenza viruses and is integral to its infectivity. Hemagglutinin is a class I fusion protein , [ 1 ] [ 2 ] having multifunctional activity as both an attachment factor and membrane fusion protein .
U5 snRNA is a small nuclear RNA (snRNA) that participates in RNA splicing as a component of the spliceosome.It forms the U5 snRNP (small nuclear ribonucleoprotein) by associating with several proteins including Prp8 - the largest and most conserved protein in the spliceosome, Brr2 - a helicase required for spliceosome activation, Snu114, and the 7 Sm proteins. [1]
An organization may take the 501(h) election by filing a one-page form with the IRS, which remains in effect until revoked by the organization. [2] [3] The 501(h) election is not available to churches or to private foundations. [4] Lobbying is defined as attempting to influence legislation, and is divided into two categories.
The squadron code is usually presented along with an individual letter or character to form a call sign for the particular aircraft. Location of the call sign combination has usually been on the rear fuselage next to the RAF roundel .
As of January 2018, the application for recognition of exemption as a 501(c)(4) organization is a new form, Form 1024-A, rather than Form 1024. [ 66 ] [ 67 ] Between 2010 and 2017, the number of 501(c)(4) organizations dropped from almost 140,000 to fewer than 82,000. [ 18 ]
Hyaluronic acid (/ ˌ h aɪ. ə l j ʊəˈr ɒ n ɪ k /; [1] [2] abbreviated HA; conjugate base hyaluronate), also called hyaluronan, is an anionic, nonsulfated glycosaminoglycan distributed widely throughout connective, epithelial, and neural tissues.
2022 revision of Form 990. Form 990 (officially, the "Return of Organization Exempt From Income Tax" [1]) is a United States Internal Revenue Service (IRS) form that provides the public with information about a nonprofit organization. [2] It is also used by government agencies to prevent organizations from abusing their tax-exempt status. [3]
The 506th Infantry Regiment, originally designated the 506th Parachute Infantry Regiment (506th PIR) during World War II, is an airborne light infantry regiment of the United States Army.