Assertion: axon | /r/HasProperty | crossed microchannel
Facets:
value: to avoid growth cone collapse
type: PURPOSE
Source sentences:
text: An initial concentration of 50 ng/mL of GDNF/BDNF was followed by a lower concentration of 5 ng/mL, once axons had crossed the microchannels, to avoid growth cone collapse ( Figure 1 A).