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Glial cell genotype directly affects motor neuron survival in culture. (a) GFP- positive motor neurons at 5, 7, 14, 21 and 28 d in culture after embryoid body dissociation. (b) Graph shows percentage of Hb9::GFP– positive cells over time in all the conditions studied. Experiments were done in triplicate and results were normalized to the number of cells found at 7 d in vitro. Error bars represent s.e.m.
