A. Natural or synthetic inhibitor ligands
1. The most popular inhibitors are aprotinin and soybean trypsin inhibitor(STI)
2. They inhibit proteases by tight interaction at their active site through a peptidic loop that fits into
enzyme active site
- A trypsin-like enzyme from a pathogenic nematode, Anisakis simples
- Flavobacterium odoratum producing elastalytic enzyme : the elastin-cellulose column
- Bnzamidine derivatives : immobilized ligands for trypsin and trypsin-like enzymes
B. Dye Binding
1. Dye molecules as affinity ligands is used by pseudoaffinity chromatography,
- Pyruvate kinase : chromophore (Cinacron Blu F3GA) of soluble Blue Dextran
- Aromatic polycyclic molecules
2. The dyes are able to bind to the active site of a protein or enzyme by virtue of its similarity to
a naturally occurring substrate
3. Several synthetic textile dyes
⑴ Cibacron
⑵ Procion families