part of part of has input has input has output has output process reaction (2S,3S)-3-methyl-L-aspartate = NH(3) + mesaconate 1 1 1 1 METACYC:METHYLASPARTATE-AMMONIA-LYASE-RXN KEGG:R03696 UPa:UCR03696 reaction RHEA:12832 acetate and pyruvate from L-glutamate: step 2/4 NH(3) mesaconate (2S,3S)-3-methyl-L-aspartate