Deletion of the right terminal repeat and the core sequences of P{Ins1a}.
Deletion derivative of P{Ins1a} does not stimulate Zw gene expression. Either the P{KP} or P{KP'} element may be present.
Deletion derivative of P{Ins1a} does not stimulate Zw gene expression. Either the P{KP} or P{KP'} element may be present.