Which of the following proteins is involved in the regulation of hematopoietic stem cell homing to the bone marrow niche?

A VLA-4
B CD44
C PSGL-1
D All of the above ✓

Explanation

VLA-4, CD44, and PSGL-1 are all adhesion molecules that play a role in the homing of hematopoietic stem cells to the bone marrow niche.

Source

Lapidot et al. (2005) Immunity
Hematology Hematology: Hematopoiesis Hematology: Hematopoiesis Hard MEDICAL Confidence: high