[];73A9--10

bk1 << l(3)73Aa << tra << bk2 << mfs(3)73A

-38 kb (dist.); +85 kb (prox.) The zero coordinate used in locating the molecular lesions is the 73A3-4 breakpoint of In(3LR)st^a27, '+' values to the right, '-' values to the left (McKeown, Belote, and Baker, 1987, Cell 48: 489-99). The distal and proximal molecular breaks of the deficiencies made by Butler et al, 1986, were estimated using this zero coordinate. (BamHI site, midway between Df(3L)E5 and Df(3L)E52, was the original zero coordinate of Butler et al.) -6 to -13. DNA coordinates (kb) of proximal breakpoints in the walk in region 73A-B of McKeown and Belote, which originates at the left breakpoint of In(3LR)st^a27 ('+' values to right, '-' values to left). Df(3L)st-E coordinates from Butler et al., 1986; coordinate 0 halfway between right breakpoints of Df(3L)st-E5 and Df(3L)st-E52; positive values to the left

homozygous lethal

Butler.

Breakpoint molecularly mapped.