I. The surplus amino acids in animals can be completely oxidizer or converted to other storable fuels Amino acids in excess(from diet protein turnover can neither -be stored, nor excreted, but oxidized to release energy or converted to fatty acids or glucose Animals also utilize amino acid for energy generation during starvation or in diabetes mellitus Microorganisms can also use amino acids as an energy source when the supply is in excess Plants almost never use amino acids as an energy source(neither fatty acids)1. The surplus amino acids in animals can be completely oxidized or converted to other storable fuels • Amino acids in excess (from diet, protein turnover) can neither be stored, nor excreted, but oxidized to release energy or converted to fatty acids or glucose. • Animals also utilize amino acid for energy generation during starvation or in diabetes mellitus. • Microorganisms can also use amino acids as an energy source when the supply is in excess. • Plants almost never use amino acids as an energy source (neither fatty acids)