This is not an erythroblast

The macrophage CD163 surface glycoprotein is an erythroblast adhesion receptor.

Erythropoiesis occurs in erythroblastic islands, where developing erythroblasts closely interact with macrophages. The adhesion molecules that govern macrophage-erythroblast contact have only been partially defined. Our previous work has implicated the rat ED2 antigen, which is highly expressed on the surface of macrophages in erythroblastic islands, in erythroblast binding. In particular, the ...

Neuroscience: This Is Not a Spider

Long-term memories of fear have been notoriously difficult to alter. A new study finds access through the window of reconsolidation.

This Is Not Your Grandfather's Emergency Department.

No, This is not a Circle

A curve, also shown in introductory maths textbooks, seems like a circle. But it is actually a different curve. This paper discusses some easy approaches to classify the result, including a GeoGebra applet construction.

Curiosity is addictive, and this is not an entirely good thing.