This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cellular Pathology, Subject name: Pathology
[{'content': 'Which of the following helps in movement and adhesion? \nSelect and explain. \nA. MCP1, B. PGE2, C. LTB4, D. CD31', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., CD31 o Platelet endothelial cell adhesion molecule (PECAM or CD-31) is present on both endothelium and leukocytes. It is the major adhesive molecule for diapedisis.Endothelial - Leukocyte Adhesion MoleculesEndothelial moleculeLeucocyte MoleculeMajor RoleP-selectinSialyl-Lewis X-modified proteinsRollingE-selectinSialyl-Lewis X-modified proteinsRolling and adhesionGlyCam-l,CD34L-selectinRollingICAM-1 (Immunoglobulin family)CD 11/CD 18 2 integrin (LFA-1, Mac-1)Adhesion,arrest, transmigrationVCAM-1 (Immunoglobulin family)VLA-4-1 integrinAdhesionPE CAM-1 (CD-31)PECAM-1 (CD-31)Diapedesis (transmigration)", 'role': 'assistant'}]