Question

1. List three examples of small bioactive peptides.

2. List some examples of prosthetic groups attached to proteins.

Answer 1

Three examples of small bioactive peptides are :

1) Val-Pro-Pro which is derived from -casein and k-casein used to reduce the blood pressure.

2) Ile-Pro-Pro which is also derived from -casein and k-casein used to reduce the BP

3) Tyr-Pro derived from whey protein used as Acetylcholineesterase (ACE) inhibitor.

Examples of prosthetic groups attached to the protein:

1) Heme is a prosthetic group (protoporphyrin ring and central iron atom) in haemoglobin.

2) Biotin is a prosthetic group in acetyl Co A carboxylase.

3) Zn⁺² is an inorganic prosthetic group in carbonic anhydrase/alcohol dehydrogenase/carboxypeptidase