Personal communication to Bloomington Stock Center from Peter Bryant:
Tp(2;Y)cb50 is a male-fertile insertional translocation of regions 31-33
into the Y chromosome, generated by Terry Lyttle (D.I.S. 65, 213 but
breakpoints are 30C; 33E not 30C; 30E as listed).  It rescues the dominant
sterility of Df(2L)J-der-39.