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GRIP-associated protein-1 (GRASP-1), also named as GRIPAP1, is a neuron-specific effector of the small GTPase Rab4 and key component of AMPA receptor recycling machinery in dendrites. GRASP-1 is essential for maintenance of spine morphology and important for LTP. GRASP-1 connects Rab4 and Rab11 recycling endosomal domains through the interaction with target (t)-SNARE syntaxin. The MW of this protein is 97 kDa, and Catalog#15806-1-AP specially recognises the 97 kDa protein.