This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Integrins include all the following Receptor except ? 
Select and explain. 
A. Fibronectin, B. Glycoprotein on platelet surface, C. Leukocyte adhesion molecule, D. Platelet derived growth factor
D: Platelet derived growth factor
Answer: D: Platelet derived growth factor 
Explanation: Ans. is 'd' i.e., Platelet derived growth factor o Integrin superfamily consists of proteins that promote cell to cell or cell to matrix adhesion (in contrast selectins promote only cell to cell adhesion). o The extracellular domain binds to : - Matrix glycoproteins Adhesions molecules on other cells Activated complement components Fibronectin and vitronectin molecules.