Subject: Re: new balancers Hi Rachel-- \*I CyO-KG00000 \*U CyO, P{y+mDint2 wBR.E.BR=SUPor-P}KG00000 is really the same thing as CyO, P{y+mDint2 wBR.E.BR=SUPor-P}RR1 described under the FBti0012145 and FBba0000396 entries. When I was in Gary Karpen's lab, I got the CyO chromosome with the P{SUPor-P} insertion from Pam Geyer's lab, where Robin Roseman (the 'RR' of 'RR1') isolated the insertion. Gary sent the stock to Hugo Bellen's lab where it was used in FBrf0179132. It's the same CyO insertion of P{SUPor-P} that was used as the P source in the following two papers, too: Dobie, K.W., Kennedy, C.D., Velasco, V.M., McGrath, T.L., Weko, J., Patterson, R.W., Karpen, G.H. Identification of chromosome inheritance modifiers in Drosophila melanogaster. Genetics 2001 157(4):1623--1637 FBrf0135802 Yan CM, Dobie KW, Le HD, Konev AY, Karpen GH. Efficient recovery of centric heterochromatin P-element insertions in Drosophila melanogaster. Genetics 2002 161(1):217--229 FBrf0149015 So, it seems to me that P{SUPor-P}KG00000 should be listed as a synonym for P{SUPor-P}RR1. Muchos gracias, Kevin