Table 1.

Number of embryoids analysed by in situ hybridization or immunolabelling and number of independent experiments performed for Figs. 1, 2, 3, 4, 5 and 6.

Panel	Number of embryoids analysed	Number of independent experiments
Figure 1
b	5154	11
d	35	2
e	26	2
f	91	3
i	12	2
j	15	2
k	60	5
l	137	2
m	46	3
n	58	2
p	67	2
q	63	2
Figure 2
b	D3.5: 12 D4: 16 D4.5: 21	2 2 2
e	D3.5: 18 D4: 13 D4.5: 19	2 2 2
g	D3.25: 65 D3.5: 18 D4: 52 D4.25: 23 D4.5: 18 D5: 19	5 2 4 2 2 2
h	D3.5: 23 D4.5: 18 D5: 21	2 2 1
1	D4: 17 D4.5: 16 D5.5: 23	1 1 1
Figure 3
a	10	1
b	13	1
c	5	1
d	42	5
e	28	2
f	16	1
g	101	3
h	47	2
i, j	7	2
k	14	4
l	100	6
m	15	2
n	10	1
o, p	18	2
q	104	5
r	59	3
s	51	3
u	12	2
v	106	3
Figure 4
a	153	6
b	42	2
c	53	2
d	69	4
e	30	2
f	12	2
g	47	3
h	26	1
i	70	4
j, k	63	5
l, m	181	11
n	40	2
o	44	2
p	17	1
q	36	2
r–t	150	9
Figure 5
a, b	87	3
c	21	2
d	43	2
e	88	3
f	58	2
g	89	4
h	29	1
i	39	1
j	29	1
Figure 6
e	44	3
f	16	1
g	46	2
i	82	3

The variability of expression pattern for each gene is described in Supplementary Fig. 4 for data of Fig. 1; Supplementary Fig. 7 for data of Fig. 2; Supplementary Figs. 9 and 10 for data of Fig. 3, Supplementary Fig. 12 for data of Fig. 4; Supplementary Fig. 13 for data of Fig. 5 and Supplementary Fig. 14 for data of Fig. 6.