Identify X and Y from the following structure | vedclass

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Question

(A) The provided image represents the structure of an antibody molecule (immunoglobulin).An antibody molecule consists of four polypeptide chains: two

Vedclass · Accepted Answer

$X$: Antigen binding site,$Y$: Heavy chain

Vedclass · Answer

(A) The provided image represents the structure of an antibody molecule (immunoglobulin).An antibody molecule consists of four polypeptide chains: two small 'light chains' and two larger 'heavy chains',represented as $H_2L_2$.The variable region at the tips of the $Y$-shaped structure forms the 'antigen binding site' (labeled as $X$ in the diagram).The longer polypeptide chains forming the stem and part of the arms are the 'heavy chains' (labeled as $Y$ in the diagram).Therefore,$X$ represents the antigen binding site and $Y$ represents the heavy chain.

Column-$I$	Column-$II$
$(A)$ Hepatitis $B$ vaccine	$(p)$ $IgA$
$(B)$ Preformed antibodies	$(q)$ Against snake venom
$(C)$ Colostrum	$(r)$ Neutrophils
$(D)$ $PMNL$	$(s)$ Yeast
	$(t)$ Basophils

Identify $X$ and $Y$ from the following structure of an antibody molecule.

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