Table 1.

GNAQ mutations identified in Sturge-Weber syndrome/capillary malformation samples

Sample ID	GNAQ Mutation	Ref Reads	Alt Reads	Allele Frequency (%)
3217	p.R183Q	606	67	10.0
3218	p.R183Q	427	43	9.1
3219	p.R183Q	468	25	5.1
3220	p.R183Q	643	37	5.4
3222	p.R183Q	897	47	5.0
3223	p.R183Q	1242	41	3.2
3224	p.R183Q	1032	36	3.4
3225	p.Q209R	567	113	16.6
3229	p.R183Q	267	19	7.1

Mutations were identified from targeted sequencing of the exons of GNAQ. The reported read counts for the reference and alternate alleles were determined after deduplication using unique molecular identifiers (UMIs).