Fig. 4. Lmo4 is expressed in subsets of LMC motoneurons in the lumbosacral spinal cord (stage 39). (A-C) Isl1/Isl2 (green) is expressed in all LMC neurons, whereas Lmo4 (red) is expressed in some of these cells. (D-H) Lmo4 expression in motoneurons supplying individual muscles was determined by retrogradely labeling with green fluorescent dye at stage 39. Lmo4 (red) is expressed in most adductor (84%, E), external femorotibialis (92%, F) and posterior iliotibialis (95%, H) motoneurons. Few sartorius motoneurons express Lmo4 (15%, D) and about half of the internal femorotibialis motoneurons are Lmo4 positive (40%, G). Only the LMC is shown; lateral is towards the left. Scale bar: 100 µm.

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