SJZ Chem-Pharm
Innovation and Expertise for Biotechnology and Pharmaceutical Applications
SJZ Chem-Pharm , has been a trusted global supplier of chemical products, biotech reagents, and pharmaceutical ingredients. Our mission is to provide comprehensive solutions that combine product quality, technical support, and educational resources to meet the needs of researchers, industry professionals, and laboratories worldwide.
➡ ISO 9001 / ISO 13485 / GMP certified production
➡ Fast global shipping and logistics
Our Biotechnology Products
🔹 ELISA — Enzyme-Linked Immunosorbent Assay
ELISA is a key method for detecting and quantifying proteins, antibodies, antigens, or hormones in samples.
💡 We offer:
- Ready-to-use ELISA kits: IL-6, TNF-α, VEGF, Insulin, CRP, AFP
- 96-well plates: high-binding, PS, PP
- Chromogenic substrates: TMB, OPD, ABTS
- Buffers and solutions: wash buffers, blocking buffers (BSA, casein), standards
- Accessories: plate lids, adhesive seals
PCR / qPCR: DNA / RNA Amplification
Polymerase chain reaction (PCR) is a fundamental molecular biology technique that enables the amplification of specific DNA sequences from minimal starting material. It is widely used in cloning, genotyping, mutagenesis, and pathogen detection.
Quantitative PCR (qPCR, also known as real-time PCR) builds upon conventional PCR by enabling real-time monitoring of DNA amplification, allowing both detection and precise quantification of target nucleic acids, including DNA and RNA (via reverse transcription).
Applications
- Gene expression analysis (qPCR with reverse transcription for mRNA or miRNA quantification)
- Pathogen detection and quantification (bacteria, viruses)
- Genotyping and mutation analysis
- Copy number variation studies
- Validation of next-generation sequencing data
💡 Our comprehensive PCR / qPCR product range includes:
PCR Master Mixes
- Standard PCR master mixes: Ready-to-use formulations for routine amplification with robust performance.
- Hot-start PCR master mixes: For higher specificity and reduced non-specific amplification, ideal for complex templates.
qPCR Master Mixes
- SYBR Green-based mixes: Cost-effective option for detecting and quantifying amplicons using intercalating dye fluorescence.
- TaqMan™ probe-based mixes: High specificity with dual-labeled probes for multiplex qPCR and precise quantitation.
Enzymes
- Taq DNA polymerase: The classic thermostable enzyme for reliable amplification.
- High-fidelity polymerases: Engineered for applications requiring accuracy (e.g., cloning, sequencing).
- Reverse transcriptase: For converting RNA into complementary DNA (cDNA) prior to amplification.
Custom primers and probes
- We offer custom-designed primers and probes tailored to your target sequences. Available upon request to suit your specific application (e.g., species-specific, mutation-specific, pathogen-specific assays).
Controls
- Positive controls: Ensure amplification works as expected and validate assay sensitivity.
- Negative controls: Monitor for contamination and non-specific amplification.
Western Blot: Protein Detection
Western blotting is a widely used analytical technique for detecting and quantifying specific proteins within complex biological samples. After proteins are separated by SDS-PAGE electrophoresis based on their molecular weight, they are transferred onto a membrane where they can be probed with antibodies for identification.
Applications
Western blot is essential for:
- Confirming protein expression in cell and tissue extracts
- Verifying recombinant protein production
- Studying post-translational modifications
- Evaluating the purity of protein preparations
💡 We supply essential reagents and materials for every step of your Western blot workflow:
Primary antibodies
We offer a wide selection of monoclonal and polyclonal antibodies targeting:
- Housekeeping proteins: actin, tubulin, GAPDH (for loading controls)
- Fluorescent tags: GFP, RFP, and other fusion markers
- Specific markers: tailored to your field (e.g. kinases, transcription factors, receptors)
Secondary antibodies
Our secondary antibodies are available conjugated with:
- HRP (horseradish peroxidase): for chemiluminescent detection
- AP (alkaline phosphatase): for colorimetric or chemifluorescent detection
- Fluorophores: for multiplex fluorescent Western blotting
Buffers
High-quality buffers for reproducible results:
- Laemmli buffer: for sample preparation and denaturation
- Tris-glycine buffer: for gel electrophoresis
- TBST / PBS-T: for membrane washing and antibody incubation
Membranes
We provide membranes optimized for protein binding and detection:
- PVDF membranes: high binding capacity, compatible with stripping and reprobing
- Nitrocellulose membranes: excellent for routine protein detection
Detection substrates
Enhance your signal with our ECL substrates:
- Standard ECL: reliable for abundant targets
- High sensitivity ECL: for low-expression proteins
- Ultra ECL: for detecting very low-abundance targets
Learn more

Our Educational Resources
- How to run a successful ELISA: from protocol to reliable results
- PCR and qPCR: mastering amplification and real-time detection
- Western blot troubleshooting: from gel to image
- Best practices for safe handling of pharmaceutical chemicals