Gene conversion due to excision of P{PZ}Abd-B05649 using Abd-BcMa.R73 as an ectopic template, resulting in an 820bp deletion that removes the Promoter targeting Sequence (PTS) from the iab-7 region. This corresponds to sequence positions 64,229 to 65,049 (SEQ89E).
Abd-Biab7-R73M males show a weak transformation of A7 to A6.
Gene conversion has been used to create an allele with the Abd-Biab7-R73 deletion that no longer carries the separate Abd-BFab7-1 deletion.