Insulin is the name given to a hormone secreted by the endocrine pancreas.
Chemically it is a protein containing about 51 amino acids (polypeptide) distributed as two chains namely A and B chains. These chains are linked by bonds called disulphide bonds.

WHAT IS INSULIN

Read The Complete DIABETES MELLITUS Series:

1. WHAT IS DIABETES MELLITUS?
2. WHAT IS INSULIN?
3. WHY IS INSULIN IMPORTANT?
4. IS DIABETES MELLITUS A COMMON DISEASE? WHY SHOULD I KNOW ABOUT IT?
5. ARE THERE DIFFERENT TYPES OF DIABETES MELLITUS?
6. WHO IS A VICTIM OF DIABETES MELLITUS?
7. WHAT ARE THE SYMPTOMS OF DIABETES MELLITUS?
8. WHAT ARE THE DIAGNOSTIC MODALITIES AVAILABLE FOR DIAGNOSIS OF DIABETES MELLITUS?
9.  WHAT WILL HAPPEN IF THE BLOOD SUGAR LEVELS ARE NOT UNDER CONTROL?
10. HOW CAN I KEEP MY BLOOD SUGAR LEVELS UNDER CONTROL AND PREVENT COMPLICATIONS OF DIABETES MELLITUS?