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The minor peaks observed at m/z values higher than 359.3 may be due to the formation of adducts between dityrosine and the other fragments present in the ionization chamber

Every batch of our peptides undergoes rigorous third-party testing to verify its purity, sequence, and concentration

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Draw prescribed insulin dose by first drawing air into the syringe matching the dose, injecting air into the insulin vial, and then drawing insulin to the correct level

1 Introduction Amino acids are one of the many biologically active macromolecules that build biological organisms and are the basic materials for cell structure and tissue repair ( Serine, including D-serine and L-serine, is known as non-essential amino acid (NEAA), which is synthesized in the body from glycine and 3-phosphoglyceric acid ( Here, we summarize the synthesis and metabolism of serine followed by the functions of serine in health and disease