Hemoglobin is a globular protein that transports oxygen in the blood. It consists of four polypeptide chains held together by disulfide bridges, with an iron-containing heme group at its center. Hemoglobin picks up oxygen in the lungs to form oxyhemoglobin, which releases oxygen in tissues and reverts back to hemoglobin. Each hemoglobin molecule can carry four oxygen molecules to support cellular respiration in tissues throughout the body.

1. HemoglobinHemoglobin
Structure & FunctionStructure & Function

2. HaemoglobinHaemoglobin
• It is a globular protein involved in metabolism
• Function :
It picks up oxygen in lungs to form
oxyhaemoglobin .This dissociates in tissues to
give up oxygen and revert to haemoglobin.
Each haemoglobin molecule can pick up four
oxygen molecules.

3. Structure of haemoglobinStructure of haemoglobin
It consists of four polypeptide
chains that are held by
disulphide bridges.
At the centre is an iron
containing group called haem
( prosthetic group(
This is called as a conjugated
protein