KDKA-TV

KDKA-TV, channel 2, is a CBS owned-and-operated television station located in Pittsburgh, Pennsylvania, United States. The station is owned by the CBS Television Stations subsidiary of CBS Corporation, as part of a duopoly with CW station WPCW (channel 19). The two stations share studios located at the Gateway Center in downtown Pittsburgh, while KDKA-TV's transmitter is located in the Perry North neighborhood of Pittsburgh.

KDKA-TV is available on cable television in the Johnstown, Altoona, and Wheeling areas, as well as several other out-of-market cable systems in northwestern Pennsylvania, northwestern Maryland, northeastern Ohio, and North-Central West Virginia. The furthest south KDKA-TV is carried on cable is in Beverly, West Virginia.

Early history

DuMont origins

The station went on the air on January 11, 1949, as WDTV ("W DuMont TeleVision") on channel 3; it was owned and operated by the DuMont Television Network. It was the 51st television station in the U.S., the third and last DuMont-owned station to sign on the air, behind WABD (now WNYW) in New York City and WTTG in Washington, D.C., and the first owned-and-operated station in the state of Pennsylvania. To mark the occasion, a live television special aired that day from 8:30 to 11 p.m. ET on WDTV, which began with a one-hour local program broadcast from Syria Mosque in Pittsburgh. The remainder of the show featured live segments from DuMont, CBS, NBC, and ABC with Arthur Godfrey, Milton Berle, DuMont host Ted Steele, and many other celebrities.

KDKA

KDKA may refer to:

KDKA (AM)

KDKA (1020 kHz AM) is a Class A clear-channel radio station licensed in Pittsburgh, Pennsylvania. KDKA is owned and operated by CBS Radio, with studios located at the combined CBS Radio Pittsburgh facility in the Foster Plaza on Holiday Drive in Green Tree and transmitter in Allison Park. KDKA operates with 50,000 watts and can also be heard in the HD Radio format.

Created by the Westinghouse Electric Corporation on November 2, 1920, it is considered the world's first commercial radio station, a distinction that has been challenged by other stations. Radio historians point out that KDKA is the world's first commercially licensed radio station. WWJ in Detroit, Michigan, (also a CBS-owned station), lists its "First Air Date" as August 20, 1920. But stations which signed on before KDKA did so with experimental licenses, not authorized for commercial broadcasting. KDKA is among only a handful of stations east of the Mississippi River whose call letters begin with a K instead of a W.

3-Deoxy-D-manno-octulosonic acid kinase

3-deoxy-D-manno-octulosonic acid kinase (EC 2.7.1.166, kdkA (gene), Kdo kinase) is an enzyme with system name ATP:(KDO)-lipid IVA 3-deoxy-alpha-D-manno-oct-2-ulopyranose 4-phosphotransferase. This enzyme catalyses the following chemical reaction

The enzyme phosphorylates the 4-OH position of KDO in (KDO)-lipid IVA.

References

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