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Dok-7 myasthenia. a Degenerating EP region displaying loss or amputation of junctional folds and accumulation of degenerate fold remnants in the widened synaptic space. b Unstained normal EP region reacted for AChR with peroxidase conjugated α-bungarotoxin. The junctional folds are intact and display a normal concentration and distribution of AChR on the junctional fold. Bars=1 μm
