Inversion breakpoint in wupA.
The '9916DL' chromosome (in which wupA, l(1)16Fe and l(1)16Fm are inactivated) is dominant lethal.
Separable from: l(1)16Fe9916DL. Separable from: l(1)16Fm9916DL. Mutation in the 'dominant lethal' domain of 16F which inactivates the wupA, l(1)16Fe and l(1)16Fm genes.