H-DL-Asn-OH是 L-天冬酰胺和 D-天冬酰胺的外消旋混合物，通常用于细菌生长培养基中。

L-Cysteine HCI Monohydrate是一种条件必需氨基酸，是硫化氢 (H2S)、谷胱甘肽和牛磺酸等生物活性分子的前体，能够抑制胃饥饿素，减少啮齿动物和人类的食欲。

L-Alanine, one of the non-essential amino acids, is involved in metabolism of sugar and acid. It can function as an agonist of inhibitory glycine receptor.

DL-Methionine is an essential amino acid which has a role in resist of oxidative stress.

H-Pro-OH is one of the common amino acids that involved in the synthesis of proteins.

L-Threonine is an essential amino acid which is in its active form. It is important for the formation of collagen, elastin, and tooth enamel, and aids liver and lipotropic function when combined with aspartic acid and methionine.

H-DL-Trp-OH是一种混合的色氨酸异构体，作为一种必需氨基酸在蛋白质合成中起关键作用，并且是5-羟色胺（血清素）和褪黑激素的前体，在调节睡眠、情绪和认知功能方面具有重要作用。

H-DL-Ala-OH是一种非必需氨基酸，参与能量代谢和肌肉合成。DL-丙氨酸在细胞呼吸中起作用，并且在糖异生过程中作为前体分子。

L-Asparagine is a non-essential amino acid that is involved in the metabolic control of cell functions in nerve and brain tissue.

H-D-(-)-Arg-OH是精氨酸的D型异构体，在合成和药物研究中具有潜在应用。

L-Cystine is the oxidized dimer form of the amino acid cysteine, plays a critical role in the regulation of cellular processes.

D-glutamic acid is the enantiomer of L- glutamic acid which is widely used in pharmaceuticals. It is also an essential constituent of bacterial peptidoglycan structure.

Glutamine is a non-essential amino acid present abundantly throughout the body and is involved in many metabolic processes.

DL-Leucine是亮氨酸的异构体，作为一种化学杀菌剂和膳食添加剂，能够抑制大肠杆菌的生长达92.08%。

L-Lysine HCl is an essential amino acid with various roles in calcium absorption, building muscle protein, recovering from surgery or sports injuries, as well as hormones, enzymes, and antibodies production.

D-proline is an isomer of the naturally occurring amino acid, L-Proline.

H-D-Val-OH是一种 D 型氨基酸，主要用于合成多肽或药物分子，在生物医药研究中有潜在用途。

H-D-Lys-OH用作促黄体激素释放激素的类似物和作为聚赖氨酸形式的活性分子载体。H-D-Lys-OH可降低肾脏对放射性的摄取，毒性低，且不干扰天然氨基酸的代谢平衡。

H-DL-Glu-OH (DL-谷氨酸) 是一种氨基酸混合物，具有兴奋性神经递质的作用，在中枢神经系统中参与谷氨酸受体的调节。谷氨酸的过度激活与神经退行性疾病（如阿尔茨海默病）有关。

Inhibitory activity against T3 binding to human TRbeta1 receptor