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Antibodies in our body are complex -
A
Lipoproteins
B
Steroids
C
Prostaglandins
D
Glycoproteins
Detailed Solution
Antibodies are proteins produced by B-lymphocytes in response to pathogens; they are called immunoglobulins (Ig).
Each antibody molecule has four peptide chains, two small light chains and two longer heavy chains, so it is represented as $H_2L_2$.
The protein chains have carbohydrate (oligosaccharide) groups attached to them, so chemically antibodies are glycoproteins.
They belong to the $\gamma$-globulin fraction of the blood plasma, and there are five classes: IgA, IgM, IgE, IgG and IgD.
They are not lipoproteins, steroids or prostaglandins.
So antibodies are complex glycoproteins.
Each antibody molecule has four peptide chains, two small light chains and two longer heavy chains, so it is represented as $H_2L_2$.
The protein chains have carbohydrate (oligosaccharide) groups attached to them, so chemically antibodies are glycoproteins.
They belong to the $\gamma$-globulin fraction of the blood plasma, and there are five classes: IgA, IgM, IgE, IgG and IgD.
They are not lipoproteins, steroids or prostaglandins.
So antibodies are complex glycoproteins.