metabolism Nutrient Utilization in Humans: Metabolism Pathways. Nutrient Utilization in Humans: Metabolism Pathways electron transport system (ETS) transamination and deamination reactions Nutrient Utilization in Humans: Metabolism Pathways Nutrient Utilization in Humans: Metabolism Pathways important role in energy metabolism Nutrient Utilization in Humans: Metabolism Pathways. www.nature.com Nutrient Utilization in Humans: Metabolism Pathways