Table 2.

Responses of BDNF-raised DRG neurons to NGF-coated beads

Concentration of BDNF (ng/ml)	(n)	% Growth cone turning	% Persistent contacts
0.05	12	17	90
10.00	10	10	90
30.00	17	24	75

Concentration of BDNF refers to the concentration the neurons were raised in and that which was also present when NGF-coated beads were introduced to the cultures. Percent persistent contacts refers to the percentage of growth cones that did not turn after contact with an NGF-coated bead but that formed persistent contacts with the beads (see text for the definition of persistent contact).