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Amino Acids and Derivatives


One of the 20 amino acids encoded by our genetic code. A non-essential amino acid.

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L-Aspartic Acid

Aspartic acid (abbreviated as Asp or D; encoded by the codons [GAU and GAC]), also known as aspartate, is an α-amino acid that is used in the biosynthesis of proteins. It contains an α-amino group (which is in the protonated −NH+ 3 form under biological conditions), an α-carboxylic acid group (which is in the deprotonated −COO− form under biological conditions), and a side chain CH2COOH. Under physiological conditions in proteins the sidechain usually occurs as the negatively charged aspartate form, −COO−. It is semi-essential in humans, meaning the body can synthesize it from oxaloacetate.In proteins aspartate sidechains are often hydrogen bonded, often as asx turns or asx motifs, which often occur at the N-termini of alpha helices.Asp's L-isomer is one of the 23 proteinogenic amino acids, i.e., the building blocks of proteins. Asp (and glutamic acid) is classified as acidic, with a pKa of 3.9, however in a peptide this is highly dependent on the local environment (as with all amino acids), and could be as high as 14. Asp is pervasive in biosynthesis.L-aspartic acid is one of the two main ingredients of the artificial sweetener aspartame, along with L-phenylalanine.

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L-Lysine Hydrochloride

1. Amino acid, nutrient
2. L-(+)-Lysine Monohydrochloride


β-Alanine is a naturally occurring beta amino acid. β-Alanine is formed in vivo by the degradation of dihydrouracil (D449990) and carnosine. β-Alanine is also the rate-limiting precursor of carnosine, as a result supplementation with β-alanine increases the concentration of carnosine in muscles.

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1. A natural constituent of animal structural proteins such as collagen and elastin. Several microorganisms producing proline trans-4- and cis-3-hydroxylase were discovered and these enzymes were applied to the industrial production of trans-4- and cis-3-hydroxy-L-proline.
2. A versatile reagent for the synthesis of neuroexcitatory kainoids and antifungal echinocandins.

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Di-tert-butyl dicarbonate

Reagent for the preparation of Boc-amino acids and peptides in high yields.


additive for oligonucleotide couplings and in racemization-free peptide couplings

L-Cysteine Hydrochloride Anhydrous

A nonessential amino acid in humans. Important in protein crosslinking.


L-Cysteine is a non-essential amino acid that can be synthesized by the human body under normal physiological conditions if a sufficient quantity of methionine is available. L-Cysteine is commonly used as a precursor in the food and pharmaceutical industries. L-Cysteine is used as a processing aid for baking, as an additive in cigarettes, as well as in the preparation of meat flavours.
Amino acids are organic compounds containing basic amino groups and acidic carboxyl groups. The hydrogen atoms on the carbon atoms of carboxylic acids are replaced by amino groups. Amino acid derivatives are substances composed of amino acids through a series of reactions. Various substances in the body, such as epinephrine and thyroid hormone, are amino acid derivatives.
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