Fig. 8.

Spinal cord neurites make position-dependent choices between muscle membranes and laminin. Cultures were prepared as in Figure 7, in which alternating lanes contained rostral membranes, caudal membranes, or laminin. Columns show percentage of cultures showing preferential outgrowth on rostral or caudal membranes (RM or CM) or laminin (L).Numbers indicate number of cultures in each category. An additional 108 cultures, not included in this graph, did not show striking preferences for either membranes or laminin (59, 28, 15, and 6 in cocultures of the types shown in Figure 7A–D, respectively).