(Solved): Draw the predominant form of arginine at \( \mathrm{pH}= \) 7.9. The \( \mathrm{pKa} \) of the side ...

Draw the predominant form of arginine at \( \mathrm{pH}= \) 7.9. The \( \mathrm{pKa} \) of the side chain is \( 12.5 \). Include proper stereochemistry. Draw the missing organic structures in the following multistep synthesis at physiological \( \mathrm{pH}(\mathrm{pH}=7.4) \). Ignore any inorganic byproducts formed. Draw the product of the reaction shown belov at physiological \( \mathrm{pH}(\mathrm{pH}=7.4) \). Ignore inorganic byproducts. Draw the starting structure that would yield this product under these conditions.