Several of the natural amino acids are synthesized from 2-oxocarboxylic acids by an enzymecatalyzed reaction with a special coenzyme called pyridoxamine. Use electron-pushing arrows to describe each step in the following synthesis of phenylalanine from phenylpyruvic acid. 

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CO.H CH,NH, CH,N=C НОСН НОСН LOH CH НО -CH,CCO,H CH3 CH3 Pyridoxamine Phenylpyruvic acid СНО CO,H CO,H НОСН N-CH CH2 НО OH N=C CH2 H H HOCH, НОСН CH3 НО H,O Рyridoxal 'N' CH3 CH3 NH2 H. -CH,CHCO,H Phenylalanine