Table 1

SRM/MRM Transitions of Peptides Probes for human OATP1B1 and OATP2B1

Protein	Target Peptide	Peptide Sequence^{^a}	MW	Residue Position^{^b}	Transmembrane Region^{^b}	Peptide References
			Da
OATP1B1	OATP1B1_pep A	LNTVGIAK / LNTVGI*AK	814.6	402-409	402-425	Sakamoto et al., 2011;
			821.6			Uchida et al., 2011;
						Schaefer et al., 2012;
						Wegler et al., 2017
	OATP1B1_pep B	DQTANLTNQGK / DQTANLTNQGK*	1188.6	306-316	–	This study
			1196.6


OATP2B1	OATP2B1_pep A	VLLQTLR/ VLLQTL*R	841.6	363-369	367-388	Sakamoto et al., 2011;
			848.6			Uchida et al., 2011;
						Schaefer et al., 2012;
						Kunze et al., 2014
	OATP2B1_pep B	YYNNDLLR / YYNNDLLR*	1069.5	641-648	–	Ji et al., 2012; Peng et al., 2015; This study
			1079.5

MW, molecular weight.
↵^a Letters with an asterisk indicate SIL amino acid residues (¹³C and ¹⁵N).
↵^b Position (start-end amino acid) of selected peptide within the targeted protein according to the Uniprot database; www.uniprot.org/uniprot/Q9Y6l6 and www.uniprot.org/uniprot/Q94956