The following information accompanied stocks donated to the Bloomington Stock Center by Kent Nybakken, Boston Biomedical Research Institute. P{UAS-wdb.HA.N} was generated by PCR amplifying the coding region of wdb (FBgn0027492) from the LD34343 cDNA with primers that incorporated a 5' Bgl II site and a 3' Not I site. This PCR fragment was then ligated into a vector made by Kent Nybakken containing an in-frame, C-terminal, triple hemagglutinin (HA) tag followed by a stop codon. The tagged form of wdb was then excised using Bgl II and Xba I and cloned into identically cut pP{UAST}. P{UAS-wdb.95-524.HA} was generated similarly by amplifying the coding region for amino acids 95 through 524. The resulting protein acts as a dominant negative. P{UAS-wdb.HA.N}3M and P{UAS-wdb.95-524.HA}1M are second chromosome insertions. P{UAS-wdb.HA.N}5M and P{UAS-wdb.95-524.HA}6 are third chromosome insertions. -- Kevin Cook, Ph.D. Bloomington Drosophila Stock Center http://flystocks.bio.indiana.edu