Table 4.

Mean lengths (± SEM) of neurites from mouse hippocampal neurons after 3 days in culture on FN or recombinant FN fragments. Axonal lengths on FN and FN 50 kDa were significantly (P < 0.02) greater than on the H120 fragment but the difference in outgrowth lengths on FN and FN 50 kDa was not significant. Numbers in parentheses beside each substratum indicate the total number of viable cells counted.

Substratum	FN (34)	FN 50 kDa (32)	H120 (44)
Mean neurite length	145 ± 20 μm	226 ± 39 μm	62 ± 4 μm