The following information accompanied stocks donated to the Bloomington Stock Center by Joe Lipsick, Stanford University. Hong Wen constructed a GFP-HP1 transposon similar to the RFP-HP1 construct described in http://flybase.org/reports/FBrf0202994.html. The construct, P{GFP-HP1}, expresses HP1 protein with an N-terminal GFP tag under control of the HP1 promoter. P{GFP-HP1}3 is a homozygous viable and fertile, third chromosome insertion.