As objects of research, we used the products processing oil flax seeds varieties August, Isilkulsky, Legur, Sokol and LM-98, grown on experimental field State Agrarian University Northern Trans-Urals, Tyumen (2020). Flaxseed cake is obtained by "cold" pressing pressing, extruded flaxseed passing previously through extruder. The amino acid composition was determined capillary electrophoresis an ...