Dear Rachel,
We recovered two independent insertions at the wg locus (28A)  in the
Kassis et al. 1992 study. Both of them have the wg embryonic lethal
phenotype and expresses lacZ in the wg pattern.
One is called 1en-11 and is inserted on a CyO chromosome. We write it CyO,
wg1en11
The other one is 17en40 and is inserted on a wild type chromosome.
Let me know if you need further information.
Best wishes,
Norbert Perrimon