G. Reuter, G. Hoffmann, R. Dorn, J. Gausz and H. Saumweber.
P{Δ2-3}99B introduced into a TM3-vKa chromosome as a result of reciprocal exchange caused by X irradiation. The resulting balancer has no additional rearrangement, and carries the P{Δ2-3}99B insertion at 99B, as in the original P{Δ2-3}99B chromosome.