Screening of truncated peptides demonstrates that a tetra-peptide version of peptide15 can inhibit Kly18.

<p>Different length versions of peptide15 were tested for Kly18 inhibitory activity. All peptides were screened in a relatively high single concentration (87 µM) to reveal if omission of single amino acid residues displayed dramatic effects on Kly18 inhibition. The data demonstrated that peptide15 can be limited to (NH₂)-SWFP-(CONH₂) (structure 15-7) and still inhibit Kly18.