Personal communication from: Bob Kreber To: Bloomington Drosophila Stock Center Background: This is information on an unpublished duplication that is present in a stock contributed to the Bloomington collection by the Ganetzky lab. Bob Kreber was queried by the stock center about the identity of this duplication. Information communicated: Dp(2;2)BG is the name Michael Ashburner gave to a tandem duplication Bob Kreber found in a stock in the Ganetzky lab. It is duplicated for approximately 41BC to 42BC and covers Df(2R)M41A at the base of 2R. This duplication is superimposed on In(2LR)Gla.