Amino acid sequences of neurotensin, 1 (NT(8–13),
in blue) and 2, as well as major enzymatic cleavage sites
(in red) of 1.3,24,25 EC 3.4.24.15: metalloendopeptidase 24.15, EC 3.4.24.16: metalloendopeptidase
24.16, EC 3.4.24.11: neutral endopeptidase 24.11, EC 3.4.15.1: angiotensin
converting enzyme (ACE).24,25aBarroso et al.41bKeller et al.42