Table IV. HSC activity in directly transplanted vitelline/umbilical arteries.

	Embryo	No. of mice repopulated/total transplanteda
Tissue	equivalent	E10.5	E11.5	E12.5
Vitelline/umbilical	2.5–5	4/35b
	3		3/7	22/24
	1		3/8	10/22
	0.3		1/3	2/16
	0.1			2/8
AGM	2.5–3	1/12		16/16
	1		4/6	14/22
	0.3		3/6	6/14
	0.1		1/3	0/10
Liverc	3	0/3	2/2
	1		2/6
	0.3		1/2

^aWith one exception (see below), only mice with ≥10% donor repopulation at 4–7 months after transfer were included as positive. Data are from a total of 12 independent experiments.

^bOne mouse transplanted with 5 e.e. of umbilical arteries was engrafted at high levels (100%) at 3 months post-transplantation, but died before the >4 month bleed could be performed.

^cLiver was used in these experiments as a positive control and thus is not mentioned in the text of the Results.