Amino acid composition of the seeds of kiwicha (Amaranthus caudatus) growing in Uzbekistan

Introduction. Amaranth seeds are an important cereal crop. They are high in protein, lysine, and other amino acids. The value of plant proteins exceeds the biological value of milk proteins, approaching that of animal protein. Amaranth protein has a balanced amino acid composition. The absence of gluten and the high level of protein make amaranth seeds a valuable product for patients with celiac disease. Recently, the preparation of natural amaranth protein concentrates has been promising. Objective: to study the composition and quantitative content of amino acids in amaranth seed meal after extraction of fatty oil with hexane. Material and methods. The amaranth seeds were harvested in the Andijan Region of the Republic of Uzbekistan in October 2019. The collected raw materials were dried in air, without direct sunlight. The content of amino acids in the amaranth seed meal was determined by HPLC. Results. A HPLC procedure for the determination of the levels of amino acids in the amaranth seeds was developed and validated. After extraction of fatty oil from the seeds with hexane, their meal was found to contain 20 amino acids. The latter were quantified; the total content of the amino acids was 7.5570 mg/g. Conclusion. The authors provide the qualitative characteristics and quantification of the amino acids in the seed meal of amaranth growing in Uzbekistan.

Amaranthus caudatus L, amaranth, Amaranthus caudatus L, protein, amino acids, HPLC