No visible cytological rearrangements.
Rm62CB02119/Rm62F mutants cells show defective RNA export as labelled RNA remains associated with the chromosomes in a tight banded pattern instead of diffusing throughout the nucleoplasm and cytoplasm, as occurs in control cells. Furthermore, the export factors sbr and Aly are redistributed within the nuclei of the mutant cells. Rm62CB02119/Rm62F cells also show defects in gene deactivation as evidenced by Br-UTP incorporation experiments.
Some Rm62CB02119/Rm62F transheterozygous mutants remain as third instar larvae for up to 5 days, whereas control animals enter prepupal development after 12 days.
Heteroallelic combination with Rm62Dem can be recovered.
Isolated as a second site modifier of the wbl mutation causing an enhancement of the eye colour phenotype.