6HLO	accession code of coordinates and structure factors in PDB
APT	aprepitant
BMAX	maximal binding parameter
CHO	Chinese hamster ovaries cell line
D	distribution coefficient
DMF	dimethylformamide
DOTA	1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid
DPBS	Dulbecco’s phosphate-buffered saline buffer
ECL	extracellular loop
ESI	electrospray ionization
hNK1R	human neurokinin 1 receptor
HS	human serum
Kd	dissociation constant
logD	logarithm of the distribution coefficient
MS	mass spectrometry
NHS	N-hydroxysuccinimide moiety
NK1R	neurokinin 1 receptor, tachykinin 1 receptor
PDB	Protein Data Bank
RCY	radiochemical yield
SD	standard deviation
SP	Substance P
TFA	trifluoroacetic acid
TM	transmembrane helix
tR	retention time