| give features of globular protein | metabolic functions
irregular amino acid
polypeptide chains folded into a spherical shape
relative unstable structures |
| explain the structure of globular proteins (p1) | it has quatenery structure of 4 polypeptide chain. 2 identical alpha - globin polypeptide of 141 amino acids each and 2 identical b - globin polypeptide of 146 amino acids each |
| explain the structure of globular proteins (p2) | each polypeptide is folded into a compact shape and all four are linked together to form an almost spherical haemoglobin molecule |
| explain the structure of globular protiens (p3) | amino acids with hydrophillic R groups in the molecule told to orient themselves to point outwards, this enables haemoglobin to be soluble and mix more readily with a water medium |
| explain the structure of a globular proteins (p4) | associated with each polypeptide chain is a haem group - which contains a fe 2+ ion, non protein groups such as a this are called prosthetic group |
| explain the structure of a globular proteins (p5) | each fe 2+ ion can combine with a single oxygen molecule, making a total of 4 o2 molecules that can be carried by a single haemoglobin molecule in humans |
