Product Introduction
l-Isoleucine is an essential branched-chain amino acid (BCAA), crucial for various physiological functions in humans and animals [1]. As one of the twenty proteinogenic amino acids, l-Isoleucine plays a key role in protein synthesis, muscle recovery, and energy regulation [2]. It is termed "essential" because the human body cannot synthesize it, making dietary intake necessary to meet physiological demands [3].
Production Process
l-Isoleucine is typically produced through fermentation or enzymatic conversion [4]. Fermentation involves using microorganisms to convert a carbon source, such as glucose or starch, into l-Isoleucine [5]. These microorganisms are selected or engineered for their high production yield and efficiency. Common bacteria used in fermentation processes include Escherichia coli and Corynebacterium glutamicum [6]. The process involves carefully controlling conditions such as temperature, pH, and nutrient supply to optimize l-Isoleucine production. Following fermentation, l-Isoleucine is separated and purified through various techniques, including chromatography, crystallization, and ion exchange resins [7]. Enzymatic conversion, on the other hand, utilizes enzymes to catalyze the synthesis of l-Isoleucine from precursor compounds [8]. This method can be more specific and efficient under optimized conditions, resulting in high-purity l-Isoleucine.
Effects and Functions
l-Isoleucine contributes significantly to muscle protein synthesis and repair, making it a popular supplement among athletes and bodybuilders [9]. It aids in the transport of nutrients and supports glucose metabolism, providing muscles with a readily available energy source [10]. l-Isoleucine helps regulate blood sugar levels by enhancing glucose uptake by muscle cells [11]. It plays a role in immune function by supporting lymphocyte activity and the production of antibodies [12]. Additionally, l-Isoleucine is involved in the synthesis of hemoglobin, contributing to oxygen transport in the blood [13]. Further research suggests l-Isoleucine may influence hormone release and overall metabolic balance [14].
Application Scenarios
l-Isoleucine is widely used in the food and beverage industry as a nutritional supplement to enhance the protein content of various products [15]. In sports nutrition, it is a key ingredient in BCAA supplements and protein powders, supporting muscle recovery and growth [16]. In the pharmaceutical industry, l-Isoleucine is used in intravenous solutions and medical foods for patients with specific metabolic disorders [17]. It is also used in animal feed to improve growth performance and overall health in livestock [18]. Research and development applications include cell culture media for biopharmaceutical production and studies on metabolic pathways [19].
Packaging and Storage
l-Isoleucine should be packaged in airtight containers, protecting it from moisture, light, and air [20]. Proper packaging materials include polyethylene bags, aluminum foil bags, and fiber drums with inner liners. It should be stored in a cool, dry, and well-ventilated area, away from direct sunlight and heat sources [21]. The recommended storage temperature is between 15°C and 25°C to maintain stability and prevent degradation and should be kept away from strong oxidizing agents and incompatible substances [22]. Under these conditions, l-Isoleucine typically has a shelf life of two years from the date of manufacture [23].
Citations:
[1] Wu, G. (2009). Amino acids: metabolism, functions, and nutrition. Amino Acids, 37(1), 1-17.
[2] Layman, D. K. (2003). The role of leucine in weight loss diets and glucose homeostasis. The Journal of Nutrition, 133(1), 261S-267S.
[3] Young, V. R. (1994). Adult amino acid requirements: the case for a major revision in current recommendations. The Journal of Nutrition, 124(8 Suppl), 1517S-1523S.
[4] Hermann, T. (2003). Industrial production of amino acids by Corynebacterium glutamicum. Journal of Biotechnology, 104(1-3), 155-172.
[5] Leuchtenberger, W., Huthmacher, K., & Drauz, K. (2005). Biotechnological production of amino acids and derivatives: current status and prospects. Applied Microbiology and Biotechnology, 69(1), 1-8.
[6] Becker, J., Wittmann, C., & Stellmacher, R. (2011). Metabolic engineering of Escherichia coli for the synthesis of L-isoleucine. Metabolic Engineering, 13(1), 26-38.
[7] Crueger, W., & Crueger, A. (1990). Biotechnology: a textbook of industrial microbiology. Sinauer Associates.
[8] Bommarius, A. S., & Riebel, B. (2004). Biocatalysis: fundamentals and applications. John Wiley & Sons.
[9] Norton, L. E., & Layman, D. K. (2006). Leucine regulates translation initiation of protein synthesis in skeletal muscle after exercise. The Journal of Nutrition, 136(2), 533S-537S.
[10] Doi, M., Yamaoka, M., Fukunaga, T., & Nakayama, M. (2003). Isoleucine, a potent plasma glucose-lowering amino acid, stimulates glucose uptake in C2C12 myotubes. Bioscience, Biotechnology, and Biochemistry, 67(9), 1942-1944.
[11] Zhang, Y., Kobayashi, H., Muneuchi, J., Iwata, M., Koizumi, H., & Oike, H. (2017). Isoleucine intake prevents hepatic steatosis through liver X receptor activation. PloS One, 12(11), e0188440.
[12] Calder, P. C. (2006). Branched‐chain amino acids and immunity. Journal of Nutrition, 136(1), 288S-293S.
[13] Rose, W. C. (1938). The nutritive significance of the amino acids. Physiological Reviews, 18(1), 109-136.
[14] Holeček, M. (2018). Branched-chain amino acids in health and disease: metabolism, alterations in blood plasma, and as supplements. Nutrition & Metabolism, 15, 33.
[15] Souci, S. W., Fachmann, W., & Kraut, H. (2000). Food composition and nutrition tables. Medpharm GmbH.
[16] Wolfe, R. R. (2017). Branched-chain amino acids and muscle protein synthesis in humans: myth or reality?. Journal of the International Society of Sports Nutrition, 14, 30.
[17] Cynober, L. (2002). Amino acid metabolism in injury and sepsis. JPEN. Journal of Parenteral and Enteral Nutrition, 26(6 Suppl), S25-S28.
[18] Baker, D. H. (2009). Ideal amino acid profiles for swine and poultry. Advances in Pork Production, 20, 153-162.
[19] Cruz, H. J., Moreira, J. L., Mota, M., & Alves, P. M. (2000). Metabolic control of recombinant protein production in mammalian cells. Trends in Biotechnology, 18(12), 520-528.
[20] United States Pharmacopeia. (2021). USP 44-NF 39. United States Pharmacopeial Convention.
[21] Codex Alimentarius Commission. (1969). General principles of food hygiene. WHO/FAO.
[22] Flickinger, M. C. (2009). Pharmaceutical process chemistry: technologies for pollution prevention and control. CRC Press.
[23] Storey, D. M., Lee, A., Tuck, M., & Giffard, C. J. (2004). Shelf life of pharmaceutical products. Australian Prescriber, 27(3), 66-68.
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