Files in this Data Supplement:

• Supplemental file 1 - Legends to Fig. S1 to S5
  MS Word document, 31K.
• Supplemental file 2 - Fig. S1 (In vivo interaction of Prep1 and p160 myb binding protein)
  Zipped TIF document, 104K.
• Supplemental file 3 - Fig. S2 (In vitro salt sensitivity of p67 and Pbx1 binding to HR1)
  Zipped TIF document, 172K.
• Supplemental file 4 - Fig. S3 (ActD induction of p160 translocation: concentration dependence)
  Zipped TIF document, 73K.
• Supplemental file 5 - Fig. S4 (p160 and p67 decrease the transcriptional activity of Hoxb1 and Hoxb2 enhancers)
  Zipped TIF document, 106K.
• Supplemental file 6 - Fig. S5 (p160 and p67 decrease the binding capacity of Prep1-Pbx1 dimers)
  Zipped TIF document, 259K.