Expressing arm^KK102545 under the control of Scer\GAL4^GMR.PU leads to a necrotic, very rough eye phenotype.

Scer\GAL4^tj-NP1624-mediated expression abolishes cyst encapsulation and results in germline cysts completely lacking an epithelium. Affected ovarioles look like tubes in which naked cysts pile up.

arm^KK102545/+; Scer\GAL4^{Mef2.247.Switch}/+ flies fed on RU486-containing food exhibit impaired long-term memory, tested at 24 hours after 5X spaced training, whereas the 24 hour memory after 5X massed training or 3 minute memory after 1X training is not significantly different from that determined in unfed flies of the same genotype. Silencing arm expression in the adult mushroom bodies produces a specific deficit in protein-synthesis-dependent long-term memory. Flies withdrawn from RU486-containing food for 5 days regain a 24 hour long-term memory performance that is indistinguishable from that of the no-RU group.

Flies with induced expression of arm^KK102545 in the adult mushroom bodies (under the control of Scer\GAL4^{Mef2.247.Switch}) exhibit a significant decrease in 24 hour long-term memory after 5X spaced training using benzaldehyde as the conditioned stimulus paired, compared with flies of the same genotype that were uninduced.

When arm^KK102545 is expressed in dorsal cluster neurons under the control of Scer\GAL4^ato.3.6 has no effect on the branching pattern in the adult medulla is disturbed.