Haemoglobin molecules

- Primary structure (4 polypeptide chains)

- Secondary structure (each polypeptide chain is coiled into a

helix

- Quanternary structure (4 polypeptides linked to form

almost spherical molecule)

- Each Fe2+ ion can combine with a single oxygen molecule

making a total of 4 O2 molecules that can be carried by 1

haemoglobic molecule)

- Primary structure (4 polypeptide chains)

- Secondary structure (each polypeptide chain is coiled into a

helix

- Quanternary structure (4 polypeptides linked to form

almost spherical molecule)

- Each Fe2+ ion can combine with a single oxygen molecule

making a total of 4 O2 molecules that can be carried by 1

haemoglobic molecule)