EDINA, MN-A Denver-based investment firm has bought the Edinborough Corporate Center, a seven-story Class A office tower in Edina.

DALLAS-HKS Inc. of Dallas has leased 142,000 square feet at Patriot Tower, a 600,000-square-foot office tower in downtown Dallas.

CAMBRIDGE, UK-Brookgate has opened Microsoft Research's new home at 21 Station Road in Cambridge.

SEATTLE-Lori Mason Curran, director of real estate investment strategy at Vulcan Real Estate, said that the sale of Amazon.com's headquarters in Seattle's South Lake Union is slated to close on Friday.

WINSTON-SALEM, NC-Herbalife Ltd. is preparing to close on the acquisition of the old Dell Inc. plant in Winston-Salem for $22.2 million by the end of this year.

TAMPA, FL-Taubman Centers Inc. has acquired the remaining 49.9% stake in International Plaza, an upscale shopping center measuring 1.2 million square feet in Tampa, to become the sole owner of the property.

DALLAS-Forest City Enterprises Inc. has started construction on a $100-million high-rise project in Uptown Dallas' West Village neighborhood.

CHICAGO-A joint venture between two investment firms from New York has agreed to purchase the Congress Plaza Hotel, an 871-room hotel at 520 S. Michigan Ave., for $275 million and plans to convert the property into condos and retail space.