 HOUSTON--BUSINESS WIRE--CenterPoint Energy, Inc. NYSE: CNP today announced support for the merger between Enable Midstream Partners, LP NYSE: ENBL and Energy Transfer LP NYSE: ET, which will result in an exchange of its investment in Enable Midstream Partners, LP in an at market, unit-for-unit transaction. CenterPoint Energy currently owns 53.7 percent of the common units representing limited partner interests in Enable, a publicly traded master limited partnership that owns, operates a 