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Table 2.

Arnt^–/– rescue

Cultures	G418^{^†}	Trans-CFC	BL-CFC	(%) BL/(BL+Trans)
Arnt^+/+	+	0	0	0
Arnt^+/+	-	76.0 (±40.4)	253 (±30.8)	76
Arnt^-/-	+	257 (±95.8)	182 (±48.0)	41
Arnt^+/+:Arnt^-/-^*	-	134 (±10.6)	580(±45.2)	81
Arnt^+/+:Arnt^-/-^*	+	58 (±4.8)	264 (±50.8)	82

Cultures	G418^{^†}	Trans-CFC	BL-CFC	(%) BL/(BL+Trans)
Arnt^+/+	+	0	0	0
Arnt^+/+	-	76.0 (±40.4)	253 (±30.8)	76
Arnt^-/-	+	257 (±95.8)	182 (±48.0)	41
Arnt^+/+:Arnt^-/-^*	-	134 (±10.6)	580(±45.2)	81
Arnt^+/+:Arnt^-/-^*	+	58 (±4.8)	264 (±50.8)	82

5 × 10⁴ cells were replated in methylcellulose.

Colonies, transitional (Trans-CFC) and hemangioblast (BL-CFC), were counted from triplicate plates and expressed either as an average (±s.d.) or as percentages.

1 × 10⁵ cells were replated in these cases.

†

Selection with 0.4 mg/ml of G418.

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