Question

The molecular mass of igg is 150 kda and that of antigen antibody complex formed in the presence of large excess of antigen is 300 kda. The molecular mas of antigen is

Answer 1

Answer:

gG antibodies are large molecules, having a molecular weight of approximately 150 kDa, composed of two different kinds of polypeptide chain. One, of approximately 50 kDa, is termed the heavy or H chain, and the other, of 25 kDa, is termed the light or L chain (Fig. 3.2).

Answer 2

Answer:

75 KDa

Explanation:

The molecular mass of IgG being 150 KDa and that of antigen-antibody complex 300 KDa.

Therefore if we want to find out the molecular mass of antigen then,

= Molecular mass of antigen antibody complex - molecular mass of IgG

= 300-150

= 150 KDa

One antibody has two antigen binding sites, hence

150/2 = 75 KDa