Imprecise excision of P{EP}bchsEP2299, resulting in deletion of the first intron, the second exon, and much of the third exon, which therefore removes the translation start site and the first ~200 amino acids of the protein.
bchs5 flies have a reduced average lifespan compared to wild-type and have age-dependent ubiquitinated aggregates throughout the CNS. These flies display wild-type motor, feeding and grooming behavior and have no developmental defects.