Three Colombians at the center of the Union Bank of California saga have been extradited to the U.S. and are set to plead guilty in federal court in Miami early Tuesday, a court document shows.

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Last year Mitsubishi-Tokyo UFJ, operating through the 100 percent subsidiary Union Bank of California, captured 13 percent of this business, placing it in first place.

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Union Bank of California, the nation's 27th biggest bank and the main unit of UnionBanCal Corp.

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