One of the ways in which an L a-amino acid can be synthesized is to carry out an Sy2 reaction between an a-bromo acid and ammonia. (The wavy line indicates that the bond could be a dash or a wedge.) Draw the stereoisomer of the a-bromo acid that would be necessary Br. H3N. R An a-bromo acid An L a-amino acid to produce L-alanine, in which the R group is CH3.

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