A student wrote three statements about antibodies.
1) Their structure depends on peptide, hydrogen and disulfide bonds.
2) They are protein molecules with both tertiary and quaternary structure.
3) Four polypeptides provide four antigen binding sites.
Which statements are correct?
1 )
1, 2 and 3
1 and 2 only
3 )
1 and 3 only
4 )
2 and 3 only
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