bradykinin analogs which were characterized by amino acid replacement by beta- ( 2-thienyl ) -l-alanine ( thi ) at positions 5 and 8 , d-phenylalanine ( d-phe ) at position 7 , and an additional replacement of hydroxyproline at position 2 or 3 were effective antagonists of bradykinin .
C0002520
amino acid
C0001898
l-alanine