Hi Dr Goriely, I am a curator of FlyBase working at the Cambridge, England, site with Prof. M. Ashburner. Prof Ashburner has noticed that the location of Gsc that you give in the sequence record X95420: FT /map='21C-D' differs from that given in this abstract: FBrf0055353 == Stella et al., 1992, A. Conf. Dros. Res. 33: 58 which is 60C-D. Could you please clear up this confusion by telling us the correct location? Many thanks, Eleanor Whitfield FlyBase > Subject: gsc location (X95420) Hi Eleanor, Sorry for the delay about your letter, but I only got it today as I moved to Uk a month ago. Concerning the discrepancy between a previous publication and our submission to Flybase of D-gsc location, I can confirm that D-Gsc is located at position 21C5-6. The previous mapping by Stella et al. was wrong (just the wrong chromosome arm!). The ms concerning D-gsc is in press in Development (and will come out in June 1996), there is another paper from Jackle's lab which is currently being reviewed about the gene as well. Anne Goriely