The following information accompanied stocks donated to the Bloomington Stock Center by Antonio Postigo, Washington University in St. Louis (12/02). P{UAS-zfh1} is the full length zfh1 coding sequence inserted in the NotI/XbaI cloning site of P{UAST}. P{UAS-zfh1-DeltaHD} is identical to P{UAS-zfh1} except the homeodomain (corresponding to nucleotides 2110 to 2293: CGGAAAGTCCG... to ....CGCAAAATGCAG) was replaced by a KpnI site. P{UAS-zfh1-CIDm} is identical to P{UAS-zfh1} except the CtBP interacting domain (PLDLS at nucleotides 2374 to 2388: CGCTGGACTTGTCC) was changed to ASASA. A description of the CtBP interacting domain is given in Postigo and Dean, 1999 (PNAS 96: 6683-6688; FBrf0111586). P{UAS-zfh1}2B, P{UAS-zfh1-CIDm}2B and P{UAS-zfh1-DeltaHD}2B are homozygous viable and fertile, second chromosome insertions.