Table 1. List of observed discrepancies between the SNPtrace Panel and STR comparisons.

	Cell line 1	Cell Line 2	Identity score (SNP)	Identity score (STR)	Observation
1	NCI-H2691	NCI-H2803	1.00	1.00	Cell lines are identical, not previously known
2	KM-12	PMF-ko14	0.99	0.72	Cell lines are identical, not previously known
3	COR-L47	COR-L51	0.78	0.44	Cell lines reported as synonymous (Sanger), but have unique profiles
4	HM7	MT-3	1.00	0.69	Identical by SNP, weak identity by STR. Discrepancy likely due to MSI affecting STRs
5	LS-180	MT-3	1.00	0.60	Identical by SNP, weak identity by STR. Discrepancy likely due to MSI affecting STRs
6	LS-174T	MT-3	1.00	0.63	Identical by SNP, weak identity by STR. Discrepancy likely due to MSI affecting STRs