Table 2. Bulk-population RNA-seq metadata and mapping statistics.

Sample ID	Celltype	Batch	Number of uniquely mapped reads	Percentage of uniquely mapping reads
H7hESC_1	D0 H7 hESC	1	29077933	77.64
H7hESC_2	D0 H7 hESC	1	32593810	72.39
H7hESC_3	D0 H7 hESC	1	30800393	74.51
H7Trzl	D0 H7 hESC	3	60399642	76.01
APS_1	D1 Anterior Primitive Streak	1	29444532	71.43
APS_2	D1 Anterior Primitive Streak	1	30585671	72.73
APS_3	D1 Anterior Primitive Streak	3	62559303	74.76
MPS_1	D1 Mid Primitive Streak	1	32195105	74.5
MPS_2	D1 Mid Primitive Streak	1	29668483	76.07
MPS_3	D1 Mid Primitive Streak	3	64236835	73.91
MPS_4	D1 Mid Primitive Streak	3	76385886	72.9
DLL1nD2nonPXM_1	D2 DLL1− Paraxial Mesoderm	2	28555523	64.46
DLL1nD2nonPXM_2	D2 DLL1− Paraxial Mesoderm	2	24999466	66.51
DLL1pPXM_3	D2 DLL1+ Paraxial Mesoderm	2	11948788	50.27
DLLpPXM_1	D2 DLL1+ Paraxial Mesoderm	2	29595403	73.74
DLL1pPXM_2	D2 DLL1+ Paraxial Mesoderm	2	25504394	71.61
D2LtM_1	D2 Lateral Mesoderm	3	79623847	72.3
D2LtM_2	D2 Lateral Mesoderm	3	85281213	70.89
D3GARPpCrdcM_1	D3 GARP+ Cardiac Mesoderm	3	87530457	69.6
D3GARPpCrdcM_2	D3 GARP+ Cardiac Mesoderm	3	94587346	74.36
Smt_1	D3 Somite	1	15272975	57.37
Smt_2	D3 Somite	1	24702016	60.63
D3EarlySmt_1	D3 Somite	3	60723730	65.19
D3EarlySmt_2	D3 Somite	3	64467176	64.97
Smt_4	D3 Somite	2	14235841	62.14
Smt_3	D3 Somite	2	20701016	62.06
Drmmtm_1	D5 Dermomyotome	1	32318123	73.43
Drmmtm_2	D5 Dermomyotome	1	18890789	63.49
D5CentralDrmmtm	D5 Dermomyotome	3	126799726	69.06
Drmmtm_3	D5 Dermomyotome	2	10583923	65.92
Sclrtm_1	D6 PDGFRA+ Sclerotome	1	20751549	58.61
Sclrtm_2	D6 PDGFRA+ Sclerotome	1	23117071	66.89
D6PDGFRApSclrtm_1	D6 PDGFRA+ Sclerotome	3	102352286	74.86