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Prostate-specific antigen (PSA, also known as kallikrein III, seminin, semenogelase, γ-seminoprotein and P-30 antigen) is a 34- kD glycoprotein produced almost exclusively by the prostate gland. It is a serine protease ( EC 3.4.21.77) enzyme, the gene of which is located on the 19th chromosome (19q13) in humans. [28]
PSA was launched in July 1991 by David Hall, owner of the coin grading company Professional Coin Grading Service (PCGS), to serve collectors as a third-party card grader. [1] At the outset, the business faced difficulties owing to a limited demand from collectors who sought card grading services. [2] Initially, many sports card dealers were ...
PSA Airlines is an American regional airline headquartered at Dayton International Airport in Dayton, Ohio, United States.The airline is a wholly owned subsidiary of the American Airlines Group and it is paid by fellow group member American Airlines to staff, operate and maintain aircraft used on American Eagle flights that are scheduled, marketed and sold by American Airlines.
PSA Group. The PSA Group ( French pronunciation: [ɡʁup pe ɛs ɑ] ), legally known as Peugeot S.A. (Peugeot Société Anonyme, trading as Groupe PSA; formerly known as PSA Peugeot Citroën from 1991 to 2016) was a French multinational automotive manufacturing company which produced automobiles and motorcycles under the Peugeot, Citroën, DS ...
Jennifer Rene Psaki [1] ( / ˈsɑːki /; born December 1, 1978) [2] [3] is an American television political analyst and former government official. A political advisor who served under both the Obama and Biden administrations, she served the Biden administration as the 34th White House press secretary [4] until May 2022.
Contact one of our Customer Service Centers or Federal Student Aid Offices. The following links will allow you to connect with offices and service centers helpful for administering federal student aid. Service Centers for Schools. View a list of the service centers helpful to schools in administering the Title IV federal student aid programs.
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The Trevor Project is an American nonprofit organization founded in 1998. Focused on suicide prevention efforts among lesbian, gay, bisexual, transgender, queer, and questioning ( LGBTQ) youth, they offer a toll-free telephone number where confidential assistance is provided by trained counselors.