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.

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