the sequence pyroglu ( 1 ) -leu ( 2 ) -tyr ( 3 ) -glu ( 4 ) -asn ( 5 ) -lys ( 6 ) -pro ( 7 ) -arg ( 8 ) - and the amino acids ile ( 12 ) and leu ( 13 ) appear to contribute mainly to the affinity or binding of nt to its receptor .
C0061472
glu
C0002520
amino acids