JBC, Vol. 252, Issue 17, 5931-5933, Sep, 1977
Trifluoroacetyl tripeptides as potent inhibitors of human leukocyte elastase
P. Lestienne, J. L. Dimicoli and J. Bieth
Trifluoroacetylated peptides are much more potent inhibitors of human
leukocyte elastase than the corresponding unblocked, acylated or
benzyloxycarbonylated peptides. The most active compound was
trifluoroacetyl-Val-Tyr-Val (Ki = 1.3 micron). A number of free and
NH2-terminal-substituted peptides exhibited similar affinities for porcine
pancreatic and human leukocyte elastase, indicating that these two enzymes
must have similar specificity sites.