Precise excision of the P{lyB} element.
flam679-5b flies have a restrictive phenotype with respect to gypsy expression (assayed by expression of a P{gypsy-lacZ.p12} reporter construct in the ovaries).
flam679-5b flies are stable for ZAM expression (assayed by expression of a P{ZAM-lacZ.LTR} reporter construct in the ovaries).
Restrictive flam allele.
Revertant.