The following information accompanied stocks donated to the Bloomington Stock Center by John Roote and Michael Ashburner (6/05).
Df(2R)Npk-rv2 deletes nec, sple, pk, pwn, l(2)43Ba and l(2)43Bb, but does not delete l(2)42Ea, l(2)42Eb, l(2)42Ec, Eb1, l(2)42Fa, l(2)43Bc, l(2)43Bd,
cos, hum, so or dpa.
Df(2R)Npk-rv3 deletes l(2)42Be, l(2)42Bf, l(2)42Bg, l(2)42Bh, l(2)42Bi, l(2)42Ca, l(2)42Cb, l(2)42Cc, l(2)42Cd, l(2)42Da, l(2)42Ea, l(2)42Eb, l(2)42Ec, Eb1 and l(2)42Fa, but does not delete nec, sple, pk, pwn, l(2)43Ba or l(2)43Bb. 
Hi John,
Df(2R)Npk-rv2 and Df(2R)Npk-rv3 are new to FB \- so they will be going into the abs data with no more info than is included in your pc unless you can provide e.g. mutagen, progenitor (I guess from their symbols that there is one), cytology, or is there non other than we know they are a two break Df. All help cheerfully received, Rachel.
my ref: rd5236
Hi Rachel,
Npk was EMS induced, weakly dominant nec pk.
The Npk-rv series were X-ray induced revertants of this dominant phenotype.
I would like to report the others in the series (no longer available):
Df(2R)Npk-rv1: deletes nec, pk, sple, l(2)43Ba, pwn, l(2)43Bb, l(2)43Bc, l(2)43Bd, cos, hum, so, l(2)43Cb, l(2)43Cc, l(2)43Da, l(2)43Db, l(2)43De, blow, scra, l(2)43Ed and possibly further distally; does not delete l(2)42Fa.
Df(2R)Npk-rv4: deletes nec, pk, sple, l(2)43Ba, pwn, l(2)43Bb, l(2)43Bc; does not delete l(2)42Fa or cos.
Npk-rv5: mutant for nec and pk
Npk-rv6: mutant for nec, weak pk
Npk-rv7: mutant for nec, weak pk.
Cytology was not carried out on any of them.
John