Table I. Trunk, but not vagal, neural crest cells avoid Slit2-expressing cells.

	In vivo		In vitro
	Control	Slit2	Control	Slit2
Live cells
Trunk	1/10	12/15	2/12	18/20
Vagal	0/6	1/8	0/6	0/6
Dried cell ghosts
Trunk			0/5	5/7
Vagal			0/6	0/6

Numbers correspond to individual embryos (in vivo) or neural tubes with migrating neural crest (in vitro) that showed avoidance when encountering either the control or Slit2-expressing cells.