Imprecise excision of the P{EP} element, resulting in deletion of the first exon of Amph.
abnormal locomotor behavior | third instar larval stage
decreased rate of movement
viable
larval somatic muscle cell | third instar larval stage
nucleus | third instar larval stage
Amph2J6 homozygous larvae show a significantly decreased crawling speed, as compared to controls; their muscles show abnormal nuclear positioning where the myonuclei are closer to each other.
Mutant larvae and adults are sluggish.