KKI 5 is a serine protease inhibitor that inhibits kallikrein and plasmin. KKI 5 may exhibit anticancer chemotherapeutic benefit and may also be used as a treatment for angioedema.

β-CGRP, human ,a 37-amino acid peptide,is the beta form of Calcitonin-gene-related peptide (β-CGRP), involved extensively in regulation of the cardiovascular and nervous systems. β-CGRP contains a disulphide bridge at the N-terminus, a C-terminal phenylalanine amide important for immune recognition, and an a-helix between residues 8 and 18.

ONPG is a colorimetric and spectrophotometric substrate used to detect β-galactosidase activity.