Bank of America has promoted John D. Gatzlaff and Calvin C. Hekman from vice president to senior vice president of its commercial lending division in the Midwest.

Their responsibilities are unchanged-developing relationships with midsize companies, Mr. Gatzlaff in Minnesota and Mr. Hekman in Michigan.

Mr. Gatzlaff, based in Minneapolis, came to the BankAmerica Corp. unit last August from First Bank System. He had been a vice president of commercial banking.

Mr. Hekman, based in Grand Rapids, Mich., came aboard last March from Old Kent Bank. He was a vice president of corporate banking.

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