A, B. GAT1- IL, C, D. GAT3-IL. A. An unlabeled cell body is surrounded by glial processes containing IL for GAT1 (arrow, GAT1-gl). B. A high magnification image shows immunogold particles (arrow) associated with glial processes near an unlabeled perikaryon (up). C. IL for GAT3 (arrow, GAT3-gl) is associated with glial processes near an unlabeled cell body. The cell displays a large nucleus (N) and limited cytoplasm. D. A high magnification image shows GAT3-ir glial processes between an unlabeled perikaryon (up) and groups of unmyelinated axons (ua) nearby. The immungold particles (arrow) are closely associated with glial cell membranes. Scale bars 500 nm.