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Which one of the following statement is not correct?

(1) Except Glycine all other naturally occuring $ \alpha$ - amino acids are optically active.

(2) $ \alpha$- amino acids have maximum solubility at their isoelectric point.

(3) A tripeptide has two peptide bonds.

(4) 4 \alpha$ - amino acides exists as Zwitter ions.

1 Answer

(2) $ \alpha$- amino acids have maximum solubility at their isoelectric point.
answered Nov 7, 2013 by pady_1
 
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