•PROTEİN METABOLİZMASI Nonessential Essential Alanine Arginine* Asparagine Histidine Aspartate Isoleucine Cysteine Leucine Glutamate Lysine Glutamine Methionine* Glycine Phenylalanine* Proline Threonine Serine Tryptophan Tyrosine Valine serum glutamate-oxaloacetate-aminotransferase (SGOT) aspartate aminotransferase serum glutamate-pyruvate aminotransferase (SGPT) alanine transaminase, ALT