8.5kb genomic fragment containing the stmA gene (extending from 4.0kb upstream of the putative transcription start site to 1.5kb downstream of the coding region).
Rescues the lethality associated with Df(2R)cmp44E-rev390.
Completely rescues the lethality of cmp44Erev499, cmp44Erev522 and cmp44Erev828.