Table 1.

Collapsin-1 reduces the area of growth cones extending from basilar pontine nuclei explants

Treatment	n (growth cones)	Mean growth cone area (μm2)	SEM	Percentage of medium only (%)
Medium only	222	95	2.9	100
Control material 1:100	132	88	2.9	93
Control material 1:500	61	92	4.2	97
Collapsin-1 1:500 (50 ng/ml)	173	61	2.7	64**
Collapsin-1 1:5000 (5 ng/ml)	57	72	6.6	76*

The area of pontine mossy fibers growth cones was measured after 40 min of exposure to collapsin-1, collapsin control material, or medium alone. **p < 0.0001 compared with “Medium only” or compared with “Control material 1:500.”

*p < 0.02 compared with “Medium only” or compared to “Control material 1:500.”