Figure 1.

Immunoreactivity for P2X₁ receptors and the MK lineage marker CD41 in bone marrow and spleen. P2X₁ receptor immunoreactivity is co-localized with the MK marker CD41 in bone marrow. (A) Similar levels of immunoreactivity were detected in tissues from 5-day-old (left panel) and adult mice (right panel). P2X₁ receptor immunoreactivity was also co-localized with CD41 immunoreactivity in the spleen from 5-day-old mice (B, left hand panels), in contrast P2X₁ receptor immunoreactivity was barely detectable in CD41 immunoreactive cells from adult spleen.