Although the same diameter, the Mark 14 was longer, at 20 ft 6 in (6.25 m), and therefore incompatible with older submarines' 15 ft 3 in (4.65 m) torpedo tubes. The Mark 14 was designed at the Naval Torpedo Station (NTS), Newport, beginning in 1922. It had a fairly small warhead and was intended to explode beneath the keel where there was no armor.
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Chromatin immunoprecipitation (ChIP) is a powerful tool for identifying proteins, including histone proteins and non-histone proteins, associated with specific regions of the genome by using antibodies that recognize a target protein or a protein modification.odifications of histone proteins constitute an important mechanism of gene regulation. Histone modifications are an early indicator of epigenetic regulation, and one way to study this phenomenon is via chromatin immunoprecipitation (ChIP).