Flies carrying UbxmBPuA have a strong UbxCbx-1-like phenotype. Can almost completely rescue homeotic transformations of the haltere disc derivatives (dorsal T3a or T3p) caused by various Ubx mutations. Can also partially rescue the A1a to T3a transformation seen in Ubx1/Ubxbxd-1 flies. Can rescue Ubx1 homozygotes from larval lethality to pupal stages. A small fraction of these animals survive to the end of pupation and secrete adult epidermis which is fully differentiated. Can completely rescue the "ppx" phenotype (T2p to T1p) of Ubx1 homozygotes and Ubx1/Ubx195 transheterozygotes.