ABC	ATP-binding cassette transporter
ABCB1	multidrug-resistance protein 1 (MDR1/P-Gp)
ABCB11	bile salt export pump (BSEP)
ABCC	multidrug resistance-associated protein (MRP)
ABCG2	breast cancer resistance protein (BCRP)
ACN	acetonitrile
ASP+	4-(4-dimethylaminostyryl)-N-methylpyridinium iodide
CsA	cyclosporine A
CYP	cytochrome P450-monooxygenases
DHP	(±)-6,7-dihydro-7-hydroxy-1-hydroxymethyl-5H-pyrrolizidine
DMSO	dimethyl sulfoxide
Em	echimidine
FBS	fetal bovine serum
GSH	glutathione
Hs	heliosupine
Im	intermedine
Ly	lycopsamine
Mc	monocrotaline
MDCK	Madin-Darby canine kidney cells
MTT	3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazoliumbromid
PA	1,2-unsaturated pyrrolizidine alkaloid
PANO	1,2-unsaturated pyrrolizidine alkaloid N-oxide
PAPS	3′-phosphoadenosine-5′-phosphosulfate
Re	retrorsine
Sc	senecionine
SDS	sodium dodecyl sulfate
SLC	solute carrier transporter
SLC10A1	Na+/taurocholate co-transporting polypeptide (NTCP)
SLC21/SLCO	organic anion transporting polypetides (OATP)
SLC22	organic anion/cation/zwitterion transporter family (OAT and OCT)
SLC22A1	organic cation transporter 1 (OCT1)
Sk	senkirkine
TEA	tetraethylammonium
Qu	quinidine