Some deficiencies with breakpoints that have not been molecularly characterized have been given estimated sequence coordinates breakpoints as referenced in FBrf0231039. As described in that reference, terminal deletions are assigned estimated "breakpoints" representing the last coordinate of the genome assembly for a given arm, while proximal breakpoints that extend into centric heterochromatin are assigned estimated "breakpoints" representing the proximal end of the genome assembly for that chromosome arm. Below are six deficiencies where we are updating the terminal or centric heterochromatin breakpoint with the latest set of coordinates.
Df(1)DCB1-35b (FBab0000370)
 X:20 ,939,503..21,345,088 (Df(1)DCB1- 35b:bk1 ) (no change from previous data)
 X:22 ,980,722..23,542,271 (Df(1)DCB1- 35b:bk2 ) (update for breakpoint in centric heterochromatin)
Df(2L)C' (FBab0001429)
 2L:22 ,536,884..22,943,135 (Df(2L)C':bk1) (no change from previous data)
 2L:23 ,513,712..23,513,712 (Df(2L)C':bk2) (update for breakpoint in centric heterochromatin)
Df(2L)lt109 (FBab0045716)
 2L:22 ,247,875..22,536,884 (Df(2L) lt109:bk1 ) (no change from previous data)
 2L:22 ,981,816..23,513,712 (Df(2L) lt109:bk2 ) (update for breakpoint in centric heterochromatin)
Df(2R)ED50004 (FBab0045680)
 2R:25 ,225,828..25,225,828 (Df(2R) ED50004:bk1 ) (no change from previous data)
 2R:25 ,255,319..25,286,936 (Df(2R) ED50004:bk2 ) (adding estimated location for terminal breakpoint)
Df(2R)Kr10 (FBab0001981)
 2R:25 ,052,331..25,061,964 (Df(2R) Kr10:bk1 ) (no change from previous data)
 2R:25 ,286,936..25,286,936 (Df(2R) Kr10:bk2 ) (update for terminal breakpoint)