Subject: l(3)03852 We find that the above P-mutation is allelic to mod(mdg4), since it fails to complement our EMS allele mod(mdg4)20. The STS Dm0283 that was obtained from this insertion by the genome project corresponds to genomic sequences (intron sequences) ~1kb downstream of the presumed transcription start site of mod(mdg4). Please contact me if you have further questions. Sincerely, Manfred Frasch