biogenic amines and polyamines metabolic pathway +
carbohydrate metabolic pathway +
energy metabolic pathway +
lipid metabolic pathway +
metabolic pathway of cofactors, vitamins, nutrients +
metabolic pathway of other amino acids +
Those metabolic reactions involved in the synthesis, utilization and/or degradation of amino acids other than the common 20 amino acids found in protein. Some of these amino acids like carnitine or homocysteine derive from primary amino acids.