Table 1.

Details of hind leg muscle tissues sampled, for ATAC-Seq and RNA-Seq, from piglets at five developmental stages

Sample ID	Gilt identifier	Age in days	Muscle tissue sampled	Piglet size	ATAC-Seq	RNA-Seq
Prenatal time points
D45L220716	23743	45	Whole hind leg	Largest	Yes	Yes
D45N220716	23743	45	Whole hind leg	Average	Yes	Yes
D45S220716	23743	45	Whole hind leg	Smallest	Yes	Yes
D60L120916	23982	60	Semitendinosus	Largest	Yes	Yes
D60N120916	23982	60	Semitendinosus	Average	Yes	Yes
D60S120916	23982	60	Semitendinosus	Smallest	Yes	No
D60S23976	23976	60	Semitendinosus	Smallest	No	Yes
D90L251016	23956	90	Semitendinosus	Largest	Yes	Yes
D90L111016	23964	90	Semitendinosus	Largest	Yes	Yes
D90L121016	23963	90	Semitendinosus	Largest	Yes	Yes
D90N251016	23956	90	Semitendinosus	Average	Yes	Yes
D90N111016	23964	90	Semitendinosus	Average	Yes	Yes
D90N031115	87480	90	Semitendinosus	Average	Yes	Yes
D90N121016	23963	90	Semitendinosus	Average	Yes	Yes
D90N231115	87502	90	Semitendinosus	Average	Yes	Yes
D90S231115	87502	90	Semitendinosus	Smallest	Yes	Yes
D90S251016	23956	90	Semitendinosus	Smallest	Yes	Yes
D90S111016	23964	90	Semitendinosus	Smallest	Yes	Yes
D90S121016	23963	90	Semitendinosus	Smallest	Yes	No
		Age in weeks
Postnatal time points
1WKL100918	21	1	Semitendinosus	Largest	Yes	Yes
1WKS100918	22	1	Semitendinosus	Smallest	Yes	Yes
6WKA050219	6455	6	Semitendinosus	Average	Yes	Yes
6WKS050219	6432	6	Semitendinosus	Smallest	Yes	Yes
6WKS131218	6383	6	Semitendinosus	Smallest	No	Yes
6WKA131218	6383	6	Semitendinosus	Average	No	Yes
6WKL131218	6383	6	Semitendinosus	Largest	No	Yes
Cryopreserved nuclei preparations
6WKA050219CN	6455	6	Semitendinosus	Average	Yes	No
6WKS050219CN	6432	6	Semitendinosus	Smallest	Yes	No