The following information accompanied stocks from John Roote, University of Cambridge (10/00). Complementation groups were defined in region 42 and representative alleles were donated to the Stock Center. These include l(2)42Aa1C2 l(2)42Ab1CC CyO, l(2)42Bapk81i l(2)42Be1DC l(2)42Bf1A13 l(2)42Bg1DA l(2)42Bh2CA l(2)42Bi1D18 l(2)42Ca2A3 l(2)42Cb1C4 l(2)42Cc1AB l(2)42Cd447 l(2)42Da1DE l(2)42Ea1BH Tp(2;2)pk-sple22, l(2)42Ebpk-sple-22 pkpk-sple-22 l(2)42Ec1DP l(2)42Fa1A10 Note that l(2)42Ebpk-sple-22 is the 42E breakpoint of Tp(2;2)pk-sple22. This sequence of gene names depends on l(2)6G11, l(2)5CC11 and l(2)4LL11 being renamed l(2)42Bb6G1, l(2)42Bc5CC1 and l(2)42Bd4LL1.