After denervation of muscle, motor axons reinnervate original synaptic sites. A recombinant fragment of the synapse specific laminin 132 chain (s-laminin) was reported to inhibit motor axon growth. Consequently, a specific sequence (leucine-arginineglutamate, LR E) of the laminin 132 chain was proposed to act as a stop signal and to mediate specific reinnervation at the neuromuscular junction (...