D-Cysteine Base is the D-isomer of cysteine, an amino acid widely used in biochemical, pharmaceutical, and stereochemical analysis. While L-Cysteine supports glutathione synthesis and detoxification pathways, D-Cysteine is not biologically active in human metabolism, making it highly valuable for controlled laboratory experiments where chirality and enzyme selectivity are critical.

Its distinct stereochemistry allows researchers to compare the behavior, reactivity, and stability of the two isomers under identical conditions. This makes D-Cysteine Base a preferred compound for pharmaceutical research, drug-development assays, protein engineering, and advanced chemical synthesis.

What Is D-Cysteine Base?

D-Cysteine Base is the mirror-image form of naturally occurring L-Cysteine. The D-form interacts differently with biological enzymes, offering a controlled reference compound for studies involving:

• Protein folding and structure analysis

• Enzymatic stereospecificity testing

• Amino acid transport evaluation

• Pharmaceutical chirality research

• Oxidation, reduction, and thiol reactivity studies

Its free-base form provides excellent solubility and reactivity for laboratory workflows.

Key Features & Specifications

• Purity: ≥98% or ≥99% (HPLC tested)

• Grade: Research & Pharmaceutical grade

• Appearance: White to off-white crystalline powder

• Solubility: Soluble in water; reactive sulfur-containing compound

• Molecular Formula: C3H7NO2S

• Molecular Weight: 121.16 g/mol

• Odor: Slight sulfur-like odor, characteristic of cysteine compounds

Quality Testing Includes:

• HPLC purity analysis

• Microbial count verification

• Heavy metal screening

• Optical rotation confirmation

• Moisture content testing

Applications of D-Cysteine Base

1. Pharmaceutical Research

D-Cysteine Base is used to evaluate:

• Drug-enzyme selectivity

• Stereochemical pharmacokinetics

• Binding affinity differences between isomers

Its predictable non-biological activity makes it ideal for controlled variable analysis.

2. Biochemical & Molecular Studies

Researchers use D-Cysteine to:

• Study thiol-based reactions

• Compare redox behaviors with L-Cysteine

• Investigate peptide synthesis pathways

• Examine structural effects in protein engineering

3. Reference Standard in Analytical Chemistry

D-Cysteine Base acts as a benchmark when testing:

• Optical rotation

• Isomeric purity

• Enzyme degradation rates

Why Choose Bioprecis D-Cysteine Base?

Quality Assurance

• Produced in GMP + ISO-compliant facilities

• Batch-tested for purity, identity, and safety

• Full documentation included: COA, SDS, TDS

Packaging Options

• 100 g, 500 g, 1 kg, 5 kg, 25 kg

• Moisture-protected, double-sealed containers

• Custom bulk orders available

Shelf Life & Storage

• Shelf life: 24–36 months

• Store in a cool, dry environment

• Protect from humidity and direct sunlight

Important Notice

This product is for laboratory and research use only. Not intended for dietary, medical, or therapeutic applications.

FAQ

1. What is D-Cysteine Base?

D-Cysteine Base is the D-isomer of cysteine used primarily for biochemical and pharmaceutical research. Unlike L-Cysteine, it is not biologically active and does not participate in antioxidant or metabolic pathways. Researchers use it to study stereochemistry, enzyme selectivity, thiol reactions, and protein structure due to its controlled and predictable reactivity.

2. What is D-Cysteine Base used for?

D-Cysteine Base is used in pharmaceutical development, biochemical experiments, protein engineering, and analytical chemistry. It helps researchers compare isomeric behavior, evaluate enzyme interactions, and investigate redox reactions. Because it is not metabolized like L-Cysteine, it provides a reliable reference in stereospecific laboratory studies.

3. How does D-Cysteine differ from L-Cysteine?

D-Cysteine differs from L-Cysteine because it is not biologically active and does not contribute to glutathione synthesis or detoxification pathways. The D-form is used for controlled experiments where scientists need to understand how stereochemistry affects enzyme interactions, molecular structure, and reaction behavior.

4. Is D-Cysteine Base safe for consumption?

D-Cysteine Base is not intended or approved for human or animal consumption because it does not participate in natural metabolic processes. It is classified strictly for research use. Laboratories and pharmaceutical developers use it for isomeric comparison, molecular analysis, and enzyme behavior studies under controlled conditions.

5. What purity level is best for D-Cysteine Base research?

High-purity D-Cysteine Base, typically ≥98% or ≥99%, is recommended for research to ensure accuracy and reproducibility. Higher purity reduces interference in biochemical assays, stereochemical studies, and redox experiments. Pharmaceutical-grade materials offer consistent performance across batch-to-batch testing.