Files in this Data Supplement:

• Supplemental file 1 - Fig. S1 (NO production in macrophages and effect of SIRP[lowercase Greek alpha] ligation on SHP-1 and -2 recruitment)
  PowerPoint presentation 102K.
• Supplemental file 2 - Fig. S2 (Effect of SIRP [lowercase Greek alpha]-ligation on the translocation of NF-[lowercase Greek kappa]B to the nucleus)
  PowerPoint presentation, 1.5MB.
• Supplemental file 3 - Fig. S3 (Alignment of the cytoplasmic SIRP[lowercase Greek alpha] protein sequences)
  PowerPoint presentation, 38K.