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Table 1 EST library IDs categorized by the description of developmental stages. Each categorized mouse developmental stage contained about 22,300 (409–71,504) EST counts on average, which corresponded to 2,900 (194–5,923) non-redundant ENSEMBL gene entries on average. Developmental status was based on Manipulating the Mouse Embryo) [27] and The Mouse [28].

From: The vertebrate phylotypic stage and an early bilaterian-related stage in mouse embryogenesis defined by genomic information

Stage Developmental status dbEST library ID
1 Unfertilized egg 16178, 16177, 10029, 14142, 1389, 867
2 Fertilized egg, 1 cell 12233, 2589, 12241, 1119, 17903
3 2 Cell 862, 1382, 5391
4 4 Cell 12243, 15709, 1524, 7328
5 8 Cell 9845, 15708, 1381
6 Morula 12244, 1532, 18029
7 Blastocyst, E4.0 12245, 10026, 1310, 1021, 875, 850, 18027, 12246, 18021
8 Trophoblast, ES cell 10033, 10023, 14556, 915, 10025, 10024, 14558
9 Formation of egg cylinder (E5.0) 12231, 18022
10 Proamniotic cavity in primitive ectoderm (E6.0) 2565
11 Advanced endometrial reaction, gastrulation starts, embryonic axis determined (E6.5) 13851, 10561
12 Primitive streak, amnion forming (E7.0) 5422, 547, 2381, 375, 2790, 12316
13 Neural plate, presomite stage (E7.5) 10036, 3777, 10562, 844
14 Neural folds, otic placode, 1–7 somites, hindgut pocket, 1st pharyngeal arch (E8.0) 2566, 1913
15 Neural folds close, 8–12 somites, 1st and 2nd pharyngeal arch, turning of embryo (E8.5) 10039, 538, 4042
16 Formation and closure of anterior neuropore, olfactory placode, 13–20 somites (E9.0) 5432, 7256
17 Forelimb bud, 21–29 somites (E9.5) 5392, 13850
18 Hindlimb and talbud, 30–34 somites (E10) 1884, 2517, 16788
19 Deep lens pit, 35–39 somites (E10.5) 1891, 15706, 528
20 Closure of lens vesicle, 40–44 somites (E11.0) 1885, 4142, 12312, 2557, 2578, 9944, 18018
21 Forefoot plate, lens vesicle detached (E11.5) 15707, 845
22 Hind foot plate, earliest sign of fingers (E12.0) 5319, 9846, 5464, 5423, 2514
23 Anterior footplate indented, (E13.0) 12258, 2521, 2554, 2521, 5469, 2555
24 Skin layers, chondrification of ribs (E13.5) 532, 15702
25 Fingers separate distally (E14.0) 12259, 2525
26 Fingers & toes separate (E15.0) 17914, 2596, 12265, 2522, 17951, 2594
27 Rib ossification (E15.5) 529, 12979
28 Reposition of umbilical hernia (E16.0) 12260, 2523, 18085, 12247
29 Wrinkled skin, umbilical hernia gone (E17.0) 12261, 18071, 12250, 12248, 12251, 2516, 1907
30 Auditory ossicles (E17.5) 12267, 18087
31 Iris and ciliary body (E18.0) 12266, 1770, 12313
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